Assistant Principal Stride IncAssistant PrincipalVARemoteSupervises and evaluates teaching staff; Manages teacher performance, developing and providing necessary training to support their professional development; Manages Master and Lead Teachers and programs; Confers with teachers, students, and parents concerning educational and behavioral problems in school; Coordinates with teacher and K12 Enrollment regarding expulsions and withdrawals; SUPERVISORY RESPONSIBILITIES: Directly supervises 15-30 Full-time Equivalent (FTE) regular employees and/or contractors. The mission of Virginia Virtual Academy (VAVA) is to provide an exemplary individualized and engaging educational experience for students by incorporating school and community/family partnerships coupled with a rigorous curriculum along with a data-driven and student-centered instructional model.
NewCIO Principal Advisor KBR IncCIO Principal AdvisorChantilly, VA$159,100–$194,400 / yearThe CIO Principal Advisor assists in supporting executive decision-making, synchronizing priorities across multiple stakeholders, and ensures timely delivery of customer initiatives. Required Education \ Relevant Experience: Master's Degree or higher in Business or Master's Degree in Science Technology Engineering and Math (STEM) and 6 years of experience.
Principal - Healthcare E4HPrincipal - HealthcareChantilly, VABuild and sustain strong client relationships to drive repeat and new business, including conducting regular executive touchpoints, attending board meetings and events for key districts, and attending industry conferences and events. This role will be pivotal in providing leadership to the Southeast region, driving business growth, serving as a trusted client advisor, and establishing MOREgroup as an industry leader within the market.
Principal Windows Systems Administrator - Polygraph Northrop Grumman CorpPrincipal Windows Systems Administrator - PolygraphVA$103,600–$155,400 / yearPreferred Qualifications: The ideal candidate will have a Bachelor's degree in Information Technology, a Security+ CE, MCSE (or similar Microsoft cert), and 6 years of Windows Server, VMWare, Active Directory, Microsoft Exchange, and Group Policy administration experience within classified environments. Candidates must meet the U.S. Government 8140 baseline certification requirements (8570 equivalent) for a Principal Computer Systems Analyst - IAT Level II (examples: Security+ CE, CCNA-Security, CND, CySA+, RHCSA).
NewPrincipal Classified Cybersecurity Analyst - Polygraph Northrop Grumman CorpPrincipal Classified Cybersecurity Analyst - PolygraphVA$114,000–$171,000 / yearCandidates must meet the U.S. Government 8140 requirements (8570 equivalent) for a Principal Classified Cybersecurity Analyst - IAM level II or higher certification (examples: CAP or CGRC, CASP+ or CompTIA Security X, GSLC, CCISP-Associate, CISM, CCISO, CISSP). Basic Qualifications: Master's degree with 3 years of relevant technical experience; OR a Bachelor's degree with 5 years of relevant technical experience; OR an Associates degree with 7 years of relevant technical experience; OR a High School Diploma/GED with 9 years of relevant technical experience is required.
NewSr. Principal Classified Cybersecurity Analyst - TS/SCI Northrop Grumman CorpSr. Principal Classified Cybersecurity Analyst - TS/SCIVA$142,200–$213,400 / yearBasic Qualifications: Master's degree with 6 years of relevant technical experience; OR a Bachelor's degree with 8 years of relevant technical experience; OR an Associates degree with 10 years of relevant technical experience; OR a High School Diploma/GED with 12 years of relevant technical experience is required. Candidates must meet the U.S. Government 8140 requirements (8570 equivalent) for a Principal Classified Cybersecurity Analyst - IAM level II certification (or higher) at a minimum (examples: CAP or CGRC, CASP+ or CompTIA Security X, GSLC, CCISP-Associate).
Principal Solution Architect Red Hat IncPrincipal Solution ArchitectVARemote$211,650–$349,250 / yearRed Hat is the world's leading provider of enterprise open source software solutions, using a community-powered approach to deliver high-performing Linux, cloud, container, and Kubernetes technologies. We are not responsible for, and will not pay, any fees, commissions, or any other payment related to unsolicited resumes or CVs except as required in a written contract between Red Hat and the recruitment agency or party requesting payment of a fee.
Principal Project Manager Engineer TE Connectivity plcPrincipal Project Manager EngineerVA$161,200–$241,800 / yearAs a trusted innovation partner, our broad range of connectivity and sensor solutions enable the distribution of power, signal and data to advance next-generation transportation, energy networks, automated factories, data centers enabling artificial intelligence, and more. The position requires close collaboration with cross-functional teams, including Corporate Real Estate, Facilities, Indirect Sourcing, Legal, Tax, Government Affairs, Operations, Engineering, Supply Chain, Finance, HR, and EHS.
Principal Network Technician Siltt LLCPrincipal Network TechnicianLeesburg, VARemoteFrom delivering world-class modular data center facilities to all-hours, 365-day operational response and disaster recovery, our multi-functional team of experts are force multipliers across the infrastructure landscape. You serve as a "Lead Trainer" and working Subject Matter Expert, deploying to global facilities to oversee rack-and-stack services, perform advanced fiber characterization, and mentor local site technicians.
Principal Manufacturing Engineer – Systems Installation ElectraPrincipal Manufacturing Engineer – Systems InstallationManassas, VAFull timeEmbedded in our Integrated Product Development Team (IPDT), your focus will be on electrical and avionics systems installation, applying DFM and DFA principles to enable efficient, scalable final assembly operations - and ensuring production test processes are built in from day one. Our Ultra Short technology unlocks thousands of new operating locations and enables what we call Direct Aviation: quiet, point-to-point regional travel that gets people from where they are to where they want to go, without the congestion of major airports or the noise of conventional aviation.
Principal Electrical Engineer (Aviation) ElectraPrincipal Electrical Engineer (Aviation)Manassas, VAFull timeThis role will be responsible for the aircraftelectrical systems - including power distribution, energy storage, conversion, and system safety protections - ensuring reliable, certifiable, and high-performance operation across the full aircraft lifecycle. At Electra, we're pioneering sustainable aviation by developing hybrid-electric Ultra Short Takeoff and Landing aircraft designed to transform regional air mobility, by making air travel more efficient, quieter, and environmentally friendly.
Principal Systems Test Engineer ElectraPrincipal Systems Test EngineerManassas, VAFull timeOur Ultra Short technology unlocks thousands of new operating locations and enables what we call Direct Aviation: quiet, point-to-point regional travel that gets people from where they are to where they want to go, without the congestion of major airports or the noise of conventional aviation. This is a hands-on leadership role - you'll mentor junior engineers, own the architecture of our simulation labs, and build the data management and automated test processes that engineering depends on to move the EL9 toward certification.
Principal Manufacturing Engineer - Primary Structures ElectraPrincipal Manufacturing Engineer - Primary StructuresManassas, VAFull timeOur Ultra Short technology unlocks thousands of new operating locations and enables what we call Direct Aviation: quiet, point-to-point regional travel that gets people from where they are to where they want to go, without the congestion of major airports or the noise of conventional aviation. As our Principal Manufacturing Engineer – Primary Structures, you'll take on one of the most consequential roles in the EL9 build: owning manufacturability and integration for major load-bearing structures - fuselage, wing, empennage, and primary structural assemblies.
Principal Digital Signal Processing Engineer Judge GroupPrincipal Digital Signal Processing EngineerLeesburg, VA$160,000–$195,000 / yearBy providing your phone number, you consent to: (1) receive automated text messages and calls from the Judge Group, Inc. and its affiliates (collectively "Judge") to such phone number regarding job opportunities, your job application, and for other related purposes. Reply STOP to opt out of receiving telephone calls and text messages from Judge and HELP for help.
Systems Engineer Principal Science Applications International CorpSystems Engineer PrincipalChantilly, VASAIC is seeking an experienced Electrical Systems Engineer to join our elite Systems Engineering and Technical Assistance (SETA) team supporting cutting-edge national security programs. Roles and Responsibilities: As a SETA, you will provide expert technical guidance and oversight to ensure program success across the full system lifecycle: Provide technical insight to the next generation electronics and sensor development.
Contracts Senior Principal Science Applications International CorpContracts Senior PrincipalChantilly, VASAIC - Contracts Senior Principal in Chantilly, Virginia, United States Join our Talent Network >Talent Network Alumni Connect Current Employees Events Featured Locations Chantilly Charleston Colorado Springs Crane El Segundo Fort Meade Hampton Roads Hawaii Huntsville Reston San Diego Southern Maryland St. Louis Washington DC View All Locations Career Fields Business Management Cyber Cloud Data Science DevSecOps Electrical Engineering Mechanical Engineering Network Engineering Software Engineering Systems Engineering Technical Support View All Career Fields View All Jobs Candidate Resources Chantilly Charleston Colorado Springs Crane El Segundo Fort Meade Hampton Roads Hawaii Huntsville Reston San Diego Southern Maryland St. Louis Washington DC View All Locations Business Management Cyber Cloud Data Science DevSecOps Electrical Engineering Mechanical Engineering Network Engineering Software Engineering Systems Engineering Technical Support View All Career Fields. Contracts Senior Principal Job ID: T2601168 Location: Chantilly, VA, United States Date Posted: Mar 8, 2026 Category: Contracts Subcategory: Contracts Schedule: Full-Time Shift: Day Job Travel: No Minimum Clearance Required: TS/SCI_w/Poly Clearance Level: Must Be Able to Obtain None Potential for Remote Work: On-Site Benefits: Click here Share mail Apply Now >Apply Now >.
Senior Contracts Principal Science Applications International CorpSenior Contracts PrincipalChantilly, VAYou will negotiate and administer various contracts to include Cost Reimbursable (CR), Time and Materials (T&M), Firm Fixed Price (FFP) and multiple Task Order contracts development; preparation, negotiation, and administration of teaming agreements and proprietary information agreements; collection and submission of data for regulatory reporting; and management of OCI Plans. negotiation and administration of various contracts to include Cost Reimbursable (CR), Time and Materials (T&M), Firm Fixed Price (FFP) and multiple Task Order contracts development; preparation, negotiation, and administration of teaming agreements and proprietary information agreements; collection and submission of data for regulatory reporting; and management of OCI Plans.
Program Control Principal Science Applications International CorpProgram Control PrincipalChantilly, VAThe analyst shall interface closely with Program Manager (PM), Program Management Office (PMO), to include, contracts, finance, accounts receivable, procurement, subcontract management to ensure accurate execution against financial goals. Our robust portfolio of offerings across the defense, space, civilian, and intelligence markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services.
Associate Principal Director, Software Mission Solutions Subdivision (SMSS) The Aerospace CorpAssociate Principal Director, Software Mission Solutions Subdivision (SMSS)Chantilly, VA$208,000–$312,000 / yearWith customers spanning the DoD, Intelligence Community (IC), civil and commercial space, ISCD blends expertise in modern software engineering, AI/ML systems, data platforms and architecture, advanced cloud and edge infrastructure, cybersecurity, and full-stack development through mission-focused, collaborative, multi-disciplinary teams. Working across commercial industry, government, and academia, this Associate Principal Director will help shape how emerging software technologies and AI capabilities are rapidly adopted by a growing and increasingly innovative aerospace customer base while building and strengthening ISCD's presence and impact in the Chantilly region.
Principal Program Manager L3Harris Technologies IncPrincipal Program ManagerChantilly, VA$130,500–$242,500 / yearKey functions will include monitoring program performance, managing the program's schedule and milestones, providing guidance to the program's integrated product teams (IPTs), coordinating with functional offices to ensure program compliance and to enable program support, leading program proposal efforts, and managing reporting requirements. The salary range for this role in Colorado state, Hawaii, Illinois, Maryland, Minnesota, New York state, Cleveland Ohio, Vermont, and Virginia is $130,500-$242,500.
Principal MBSE Systems Engineer Science Applications International CorpPrincipal MBSE Systems EngineerChantilly, VA$160,001–$200,000 / yearYou will develop and maintain system models (ensure endtoend traceability, and support SIPaligned onboarding and integration, working closely with the Chief Engineer, System Architect, Integrator, Release Manager, and Government stakeholders to keep the technical baseline accurate, testable, and mission ready. Develop and maintain MBSE models (SysML; DoDAF/UPDM/UAF) in Cameo Systems Modeler / Teamwork Cloud to capture architecture, behavior, data flows, and interfaces.
Proposal Writer Principal Science Applications International CorpProposal Writer PrincipalChantilly, VA$120,001–$160,000 / yearKnowledge of infrastructure modernization, applications/software development and sustainment, cloud solutions, warfighter solutions, and agile methodologies for defense, civilian, space, and National security sectors of the federal government. You will provide full lifecycle, Federal proposal support, from content planning, template development, and writing and editing key sections (resumes, past performance, and narrative volumes), through submission.
Principal, Subcontracts (Supply Chain Advisor) L3Harris Technologies IncPrincipal, Subcontracts (Supply Chain Advisor)Chantilly, VAThe role will also advise on novations/assignments, software licensing for Commercial and Free and Open-Source Software, basic intellectual property provisions, teaming agreements and other collaborative agreements, proprietary information agreements, and other agreement types. This role provides advisory support to ensure appropriate escalation of issues, improve the quality and consistency of submissions to OGC, and reduce unnecessary legal involvement where matters can be resolved within Supply Chain.
Network Security Principal Engineer Verizon Communications IncNetwork Security Principal EngineerAshburn, VA$120,500–$231,000 / yearFamiliarity with Network Function Virtualization (NFV), Identity and Access Management (IAM) solutions, the system development lifecycle, mitigating network/system/application layer attacks, and working with SQL/NoSQL databases and UNIX/Linux operating systems. The role requires deep expertise in network protocols, hands-on experience with routers/switches, SIEM tools (especially SPLUNK and ISE), and a strong focus on automation, threat detection, incident response, and continuous security validation across the organization.
Systems Engineer Sr Principal Science Applications International CorpSystems Engineer Sr PrincipalChantilly, VABy providing the information below and checking the boxes referenced, you acknowledge and consent to SAIC''s Privacy Policy to include access and use of your information for the purposes of sharing your information for possible employment recruitment effects by SAIC and it''s third party vendors. SAIC - Systems Engineer Sr Principal in Chantilly, Virginia, United States.
Principal Software Developer Leidos Holdings IncPrincipal Software DeveloperAshburn, VA$131,300–$237,350 / yearAAC is part of the FAA's broader initiative to modernize legacy flight service systems, replacing aging infrastructure with a scalable, cloud-based platform designed to improve safety and operational efficiency-particularly in remote and high-dependency aviation environments like Alaska. Leidos is seeking Principal Software Developers to join the Air Traffic Business Area within the Homeland Sector, supporting the development of the Alaska Automation Capability (AAC).
NewSenior Principal Oracle Fusion Cloud HCM Functional Consultant CACISenior Principal Oracle Fusion Cloud HCM Functional ConsultantAshburn, VirginiaCACI is seeking a Senior Principal Oracle Fusion Cloud HCM Functional Consultant / Subject Matter Expert to provide cross-module design authority on the OPM Modernization, one of the most significant federal HCM transformation efforts underway, migrating legacy HR systems to Oracle Fusion Cloud HCM for the U.S. civilian federal workforce. At the T5 level, you are the recognized SME who sets functional direction across multiple Fusion HCM modules, owns the Application Security role architecture, and serves as the authority on federal HR policy interpretation - including pay structures under Titles 5, 38, and other authorities in use by the Civilian Federal Workforce.
NewPrincipal Oracle Fusion Cloud HCM Functional Consultant CACIPrincipal Oracle Fusion Cloud HCM Functional ConsultantAshburn, VirginiaCACI is seeking a Principal Oracle Fusion Cloud HCM Functional Consultant to lead a module workstream on the OPM Modernization — one of the most significant federal HCM transformation efforts underway, migrating legacy HR systems to Oracle Fusion Cloud HCM for the U.S. civilian federal workforce. Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications.
Principal Consultant - Deltek Costpoint BlueStreetPrincipal Consultant - Deltek CostpointChantilly, VirginiaThe Principal Consultant guides project delivery, provides quality oversight, mentors junior team members, and serves as a primary point of contact for clients—driving successful outcomes through strong project management, analytical capability, and exceptional customer service. BlueStreet seeks a Principal Consultant specializing in Deltek Costpoint to lead and execute complex ERP implementation and business intelligence projects for Govcon clients.
NewPrincipal RF Payload Engineer Science Applications International CorpPrincipal RF Payload EngineerChantilly, VA$160,001–$200,000 / yearOur robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. This role contributes to the development, verification, and sustainment of RF payload hardware for space-based intelligence, surveillance, reconnaissance (ISR), and communications missions.
NewPrincipal Integration Engineer Science Applications International CorpPrincipal Integration EngineerChantilly, VA$160,001–$200,000 / yearOur robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services. Bachelor's degree in Electrical Engineering, Mechanical Engineering, Aerospace Engineering, Applied Physics, or related field; Master's preferred.
Business Analyst Principal Science Applications International CorpBusiness Analyst PrincipalAshburn, VA$120,001–$160,000 / yearInterpret and translate the captured technical and functional requirements into technical documentation that can be used by both the project management team and the development teams to develop the end user software using Java technologies. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services.
Config Analyst Principal Science Applications International CorpConfig Analyst PrincipalChantilly, VA$120,001–$160,000 / yearAs the daily Point of Contact (POC) for releases and deployments, the team member will manage releases across varying complexity from less than an hour, to multi-day, large-team deployments, while working with Release Train Engineers, Scrum Masters and staff to establish then maintain adherence to release schedules. Work collaboratively yet independently: engage and drive Release Delivery Schedule during unified planning ceremonies, then complete Release Management tasks without outsized reliance on other team members.
Automation Engineer Principal Science Applications International CorpAutomation Engineer PrincipalAshburn, VA$80,001–$120,000 / yearProven ability to develop, execute and maintain automated test suites across multiple environments: backend applications, middleware, desktop, and web service testing using Soap UI with basic XML knowledge. Strong written/oral communication skills and problem-solving skills; ability to communicate information to a variety of groups at different technical skill levels.
Solutions Architect Senior Principal Science Applications International CorpSolutions Architect Senior PrincipalChantilly, VAReporting directly to the Intel Space CTO, this individual will serve as a technical cornerstone of SAIC''s capture and proposal efforts, translating complex government requirements into compelling, winning technical solutions. Our robust portfolio of offerings across the defense, space, intelligence, and civilian markets includes secure high-end solutions in mission IT, enterprise IT, engineering services, and professional services.
Principal Security Engineer Verizon Communications IncPrincipal Security EngineerAshburn, VA$120,500–$231,000 / yearThe engineer would be required to leverage automation platforms to develop scripts and tools to enhance security operations and play a key role in monitoring, analyzing, and leading response to network security incidents while implementing proactive measures to safeguard critical assets. You will be responsible for owning the Network security posture, Security Lifecycle and protection against threats across the Broadband access network that includes, but is not limited to Edge Routers, Broadband Access routers and switches, CPE equipment and RAN transport infrastructure.
Commercial Pricing and Business Strategy Senior Principal Science Applications International CorpCommercial Pricing and Business Strategy Senior PrincipalVARemote$120,001–$160,000 / yearThe successful candidate for this position will specifically enable SAIC executive leadership to make strategic Go To Market decisions through interpretation of market research, setting of commercial list prices and preparation of short term and long term Revenue and Profitability projections associated with prioritized Commercial Products/Services to take to market. Experience with developing pricing strategies for emerging technology (e.g., AI, cloud computing, etc.) including identifying and assessing new technology opportunities, understanding market trends and client landscapes, creating comprehensive pricing models, and ensuring alignment with organizational goals and regulatory requirements.
NewSenior Principal Digital Engineer Science Applications International CorpSenior Principal Digital EngineerChantilly, VA$160,001–$200,000 / yearSupport development or assessment of system Concept of Operations, Requirements Documents, Test Plans, Contract Statements of Work, Systems Engineering Plans, and contribute to staff work needs (e.g., action items, weekly reports, etc.), including support to acquisitions and source selections. You will drive end-to-end digital engineering efforts, from problem framing and architecture design through production, deployment, and operational excellence-while serving as the trusted technical advisor for mission-critical systems.
NewPrincipal Structures Mfg Engineer - Aerospace (Equity) Electra-AeroPrincipal Structures Mfg Engineer - Aerospace (Equity)Manassas, VACandidates must possess a Bachelor's in a relevant field, have over 10 years in aerospace manufacturing, and a proven track record with structural assemblies. Electra-Aero in Manassas, VA is seeking a Principal Manufacturing Engineer to lead structures manufacturing for the EL9 aircraft project.
NewPrincipal Manufacturing Engineer - Aircraft Primary Structures Electra-AeroPrincipal Manufacturing Engineer - Aircraft Primary StructuresManassas, VAThe RoleAs our Principal Manufacturing Engineer – Primary Structures, you'll take on one of the most consequential roles in the EL9 build: owning manufacturability and integration for major load-bearing structures - fuselage, wing, empennage, and primary structural assemblies. Lead coordination with Tier 1 suppliers and internal manufacturing teams supporting major structural assemblies (fuselage sections, wing structures, empennage).Ensure alignment on requirements, schedule, cost, quality, and risk to meet program objectives.
Principal Technical Consultant BlueStreetPrincipal Technical ConsultantChantilly, VirginiaThis role leads the development of business and design specifications to support software development and integration activities, create custom integrations to enable seamless data interchange between applications, and develops scripts and processes for data conversion, migration, and validation. The consultant also produces clear and comprehensive documentation to support conversion, migration, and integration efforts, ensuring smooth implementation and long‑term maintainability.
Sr Principal Program Cost Control Analyst Northrop Grumman CorpSr Principal Program Cost Control AnalystChantilly, VA$117,500–$176,300 / yearThe PCA will perform analysis and prepare reports to ensure that contracts are within negotiated and agreed-upon parameters and government cost control guidelines, including maintaining accurate records of expenditures, directing preparation of expenditure projections, and submitting timely requests for additional funding to the government. The PCA will support audits and reviews as requested by programs, customers, and company management, support Annual Operating Plan, Resource Plan, and Long Range Strategic Plan activity, and prepare financial input to internal reports and presentations (IPRS, Dashboards, BARs, Etc.).
Principal Account Executive F5 IncPrincipal Account ExecutiveVARemote$139,200–$208,800 / yearPrepares formal proposals and presentations, presents to all levels of the organization including executives, leads negotiations, coordinates complex decision-making processes and overcomes objectives to closure, and closes sales in a professional and effective manner. Responsible for significant key partner relationship management and development including F5 channel partners, new channel partners and small disadvantaged firms within the Systems Integrators supply chain management system to build channel synergy with the appropriate Systems Integrator.
Principal Services Executive - Diversified Industries Workday IncPrincipal Services Executive - Diversified IndustriesWashington, VA$169,000–$253,600 / yearWe work closely with Account Executives, Sales Directors, Pre-sales, Value Engineering, Partners, and Customer Success to shape services strategy, differentiate Workday's deployment approach, and set customers up for successful implementations. The team is accountable for protecting and advancing Workday's track record of customer satisfaction while helping drive subscription growth, services adoption, and long-term platform consumption across Medium Enterprise customers.
Principal Software Engineer, Full Stack JSI TelecomPrincipal Software Engineer, Full StackChantilly, VA$95,000–$225,000Actual compensation will be determined based on a variety of factors, including, but not limited to, the seniority level (junior, intermediate or senior) at which the position is filled, education, relevant work experience, industry experience, technical skills, certifications, and internal equity. Possess extensive application development experience, and software engineering and architecture expertise using multiple program languages (e.g., C, C++, C#, ASP.Net, Java, JavaScript, SQL, jQuery, XML, Perl, YAML, and JSON).
AWS Full Stack Developer Software Engineer - Principal I Argo Cyber SystemsAWS Full Stack Developer Software Engineer - Principal IDulles, VAFull timeArgo Cyber is supporting a U.S. Government customer on a large mission critical development and sustainment program to sustain and operate a network operations environment, including introducing new cyber capabilities to address emerging threats. Candidates selected for employment in positions requiring access to sensitive or classified information may also be subject to additional U.S. Government background investigations and security adjudication processes , including DHS Entry on Duty (EOD) suitability or equivalent federal clearance requirements.
Environmental Senior Project Manager - Principal ECS LtdEnvironmental Senior Project Manager - PrincipalChantilly, Virginia$80,000–$130,000 / yearECS is currently ranked #60 in Engineering News-Record’s Top 500 Design Firms (April 2026), #148 in Engineering News-Record’s Top 200 Environmental Firms (October 2025) and #50 in Zweig Group’s Hot Firm List (May 2025). Bachelor and/or Master of Science in Civil Engineering, Environmental Engineering, or other Engineering degree applicable to Environmental Consulting, Natural or Environmental Science, Geology, or other degree relevant to the practice of Environmental Consulting.
Principal Sales Consultant (Remote) ApolisPrincipal Sales Consultant (Remote)Leesburg, VARemote$120–$150 / yearThe ideal candidate brings a hybrid background—capable of selling consulting-led engagements while also leveraging strong relationships within key OEM ecosystems (currently seeking those with notable relationships with HPE, Arista Networks, and/or Zscaler) to originate, influence, and close integrated solutions. This role is designed for senior sales professionals who excel at building markets, breaking into new accounts, and closing complex, high-value opportunities that combine consulting services with strategically aligned technology solutions.
Principal Network Engineer ManTech International CorpPrincipal Network EngineerChantilly, VALead complex network troubleshooting and root cause analysis across enterprise, data center, cloud, and hybrid environments, utilizing packet captures, routing analysis, traffic flow inspection, and protocol level diagnostics to rapidly identify and resolve service-impacting issues. Must occasionally move about inside the office to access file cabinets, office machinery, or communicate with co-workers, management, and customers via email, phone, or virtual platforms, which may involve delivering presentations.
Senior Principal Mission Engineer OASYS IncSenior Principal Mission EngineerChantilly, VARequired Experience, Skills and Attributes: Master's Degree in Math, Science or Engineering with 15+ Years of demonstrated system engineering and integration experience with space, ground, operations and sustainment segments of DoD or NRO programs with a proven delivery record or a bachelor's degree in Math, Science or Engineering with 17+ Years of demonstrated experience. Make a difference for national security by joining a team of dedicated professionals who assist the Space Development Agency in developing and deploying the next generation of satellites and ground systems for missile warning (MW), missile tracking (MT) and missile defense (MD).