Principal Software Engineer – Cyber Analytics G2 Ops, Inc.Principal Software Engineer – Cyber AnalyticsArlington, VA$145,000–$170,000 / yearThis role provides hands-on technical leadership across the program's software application portfolio, with primary responsibility for leading the development and continued evolution of the SOFIA Cyber Analytics Platform , as well as technical oversight of MONARCH, SMART, and related cybersecurity and digital engineering applications . The Software Engineering Capability Lead works closely with cybersecurity engineers, systems engineers, program leadership, and customer stakeholders to translate mission and technical requirements into executable software solutions supporting Department of Defense customers.
Principal AI Developer MarkonPrincipal AI DeveloperAnnapolis Junction, Maryland$120,000–$200,000 / yearFull timeTechnical Proficiency: Proficient in current AI/ML technologies such as classification, clustering, collaborative filtering, search, and retrieval using techniques such as but not limited to deep neutral networks (DNN), recurrent neural networks (RNN), attention-based transformers, etc. The candidate will work across multiple technical domains including software engineering, data science, machine learning, and large language model (LLM) integration to deliver innovative capabilities from proof-of-concept through operational deployment.
Principal Proposal Subcontract Manager CACI International Inc.Principal Proposal Subcontract ManagerReston, VA$84,900–$178,400 / yearPay 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. The Principal Proposal Subcontract Administrator is responsible for providing pre-award proposal support to large proposal efforts often with large teams of subcontractors.
Principal Control Systems Engineer, PAT Systems Blue OriginPrincipal Control Systems Engineer, PAT SystemsWashingtonand/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing, vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training. Required for Certain Job Profiles: Drivers who operate Commercial Motor Vehicles with a Gross Vehicle Weight (GVW), Gross Vehicle Weight Rating (GVWR) or combination of power unit and trailer that meets or exceeds 10,001 lbs.
Principal Data Scientist Markon SolutionsPrincipal Data ScientistAnnapolis Junction, MD$150,000–$210,000 / yearOur growing reach extends across 17 states, 116 countries, and 5 continents, where our team of dynamic professionals collaborates to deliver unparalleled program and project management services. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.
Sr. Principal Threat Intelligence Engineer- Remote or Hybrid in MN or DC UnitedHealth Group IncSr. Principal Threat Intelligence Engineer- Remote or Hybrid in MN or DCWashington, DCRemote$134,600–$230,800 / yearThe Senior Principal Threat Intelligence Engineer is expected to conceptualize, guide, and execute the delivery of technical intelligence solutions to CTI, SOC, Threat Detection, and Threat Hunting teams that accelerate the processing and dissemination of intelligence, increase speed of detection, and enable rapid response. The role focuses on ingesting, normalizing, and enriching threat intelligence information, integrating Threat Intelligence Platforms (TIPs) and intelligence sources with security tooling (e.g., SIEM, SOAR, EDR), and deploying automated intelligence-enabled detection and response workflows.
Principal Network Evaluator MarkonPrincipal Network EvaluatorAnnapolis Junction, Maryland$120,000–$225,000 / yearFull timeResponsibilities: Mission Focus: Conduct proactive computer network defense activities by analyzing systems and networks to identify vulnerabilities, detect network intrusions, monitor security events, assess attack surfaces, and develop operational courses of action to mitigate cyber threats. Knowledge of Network Defense Integrity (NDI) Methodology, digital forensics, intrusion detection systems, vulnerability scanning technologies, MITRE ATT&CK, NIST cybersecurity frameworks, and scripting languages.
Principal Account Manager - Navy and Marine Corps Aviation Honeywell AerospacePrincipal Account Manager - Navy and Marine Corps AviationWashington, DCWe are currently seeking a dynamic and experienced Principal Account Manager to lead strategic customer engagements in the Naval Aviation sector, specifically supporting U.S. Navy, Marine Corps, Coast Guard, and OEM clients. Honeywell Aerospace products and services are found on aircraft across commercial aviation, defense and space - from engines and cockpit electronics to cabin systems, mechanical components and connectivity solutions.
Principal Engineer – TeraWave RF and Optical Systems Blue OriginPrincipal Engineer – TeraWave RF and Optical SystemsWashingtonand/or transports placardable amounts of hazardous materials by ground in any vehicle on a public road while in commerce, may be subject to additional Federal Motor Carrier Safety Regulations including: Driver Qualification Files, Medical Certification (obtained before onboarding), Road Test, Hours of Service, Drug and Alcohol Testing, vehicle inspection requirements, CDL requirements (if applicable) and hazardous materials transportation/shipping training. Direct the architecture of high-fidelity HITL frameworks that replicate orbital dynamics — delay/Doppler profiles, azimuth/elevation tracking, handovers, and real-time kinematics — using CATR/anechoic ranges, channel emulators, GNSS simulators, hexapods/positioners, and precision RF and optical reference instrumentation.
Principal Network Evaluator Markon SolutionsPrincipal Network EvaluatorAnnapolis Junction, MD$120,000–$225,000 / yearMission Focus: Conduct proactive computer network defense activities by analyzing systems and networks to identify vulnerabilities, detect network intrusions, monitor security events, assess attack surfaces, and develop operational courses of action to mitigate cyber threats. Knowledge of Network Defense Integrity (NDI) Methodology, digital forensics, intrusion detection systems, vulnerability scanning technologies, MITRE ATT&CK, NIST cybersecurity frameworks, and scripting languages.
Principal Space Vehicle System Design Lead Blue Origin Enterprises LPPrincipal Space Vehicle System Design LeadReston, VA$169,624–$237,473.25 / yearYour effectiveness stems from four integrated competency areas: (1) Technical Expertise - deep domain knowledge in space vehicle systems engineering, electronics, embedded software, controls algorithms, sensors, actuators, power systems, and data networks, combined with systems-level thinking that anticipates downstream impacts of design decisions; (2) Technical Leadership - sound judgment that balances innovation with reliability, fluency in design reviews, failure analysis acumen, and confident decision-making under uncertainty; (3) People & Team Dynamics - mentorship mindset, cross-functional influence, composure under pressure, and a collaborative style that fosters innovation and resilience; and (4) Strategic Vision & Organizational Impact - tying technical decisions to mission success and business goals, identifying organizational gaps before they escalate, and communicating a compelling technical vision across all levels. As a Principal Systems Engineer on a hardworking team of talented specialists, technicians, and engineers, you will function as the Space Vehicle System Design Lead for a unique customer mission within the Blue Ring Systems Engineering, Integration & Test organization, working closely with other system, software, hardware and integration & test engineers to develop the optimal space vehicle system solution for unique Blue Ring Spacecraft missions and customer needs.
Principal Product Manager – SAR Data Products Iceye UsPrincipal Product Manager – SAR Data ProductsHerndon, Virginia$190,000–$230,000 / yearThrough that collaboration, this role is responsible for establishing and delivering world class SAR constellation access and SAR data products through an intuitive system that ensures customers can easily interact with the constellation and integrate our data and capabilities into existing workflows and analytics platforms. Some travel may be necessary – the ability to travel by car, plane, train, bus, vessel, or metro, operate a motor vehicle and maintain a valid Driver’s License and/or effectively navigate public transportation is required.
Principal Cybersecurity Engineer Avenue Technologies CompanyPrincipal Cybersecurity EngineerSterling, VirginiaAvenue Technologies is seeking a Principal Cybersecurity Engineer to support technical, engineering, and program teams in a hands-on environment. Coordinate with engineering and program teams to maintain secure and compliant systems.
Principal Software Engineer The Josef GroupPrincipal Software EngineerColumbia, MarylandDesign and code new software or modify existing software to add new features, with expertise in Java and related development frameworks. Develop simple data queries for existing or proposed databases or data repositories (e.g., SQL, NoSQL).
Principal AI & Machine Learning Engineer - U.S. Based Hybrid Opportunity Common AppPrincipal AI & Machine Learning Engineer - U.S. Based Hybrid OpportunityArlington, VA$144,160–$162,180 / yearThe Principal Artificial Intelligence (AI) & Machine Learning (ML) Engineer is the technical leader responsible for embedding artificial intelligence into enterprise workflows and analytic processes to drive measurable gains in productivity, insight generation, and decision support within the Data Analytics & Research (DAR) division. Reporting to the Senior Director, Analytics Engineering, the Principal AI/ML Engineer partners closely with Data Engineering, Data Governance, and cross-functional business stakeholders to ensure that AI solutions are scalable, secure, compliant, and aligned with enterprise data strategy.
Principal Product Engineer BytoaPrincipal Product EngineerColumbia, Maryland$235,000–$255,000 / yearYou'll be expected to have strong opinions loosely held, challenge the status quo relentlessly, and help us build products that create meaningful impact in the cybersecurity AI space. Participate actively in leadership team discussions, bringing technical depth and product intuition to debates about direction, project prioritization, and strategic decisions.
Principal Optical Engineer Avantus FederalPrincipal Optical EngineerLorton, VA$164,500–$213,500 / yearYou'll support programs to provide our customers with capabilities like long-range optics for scout surveillance and fires support, body-worn EOIR sensors, fire control, and more- you'll help provide the sensing capability that enables the 'observe' stage of the OODA (observe, orient, decide, act) loop. QinetiQ US is looking for a Principal Optical Engineer experienced in electro-optic/ infrared (EOIR) imaging sensor optical design, laboratory optical characterization, and prototype integration with a willingness to learn new skills to join our team.
Principal Supplier Quality Engineer, PWB- Electronics Category BAE Systems PlcPrincipal Supplier Quality Engineer, PWB- Electronics CategoryReston, VA$118,095–$200,762 / yearAbout BAE Systems Electronic Systems BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. We are searching for a Printed Wiring Board Professional to fulfill a Supplier Quality Engineering role in the Supplier Quality Electronics Category Team, with applied industry experience in engineering, manufacturing, inspection, and acceptance of high reliability Printed Wiring Boards of varying types and complexities.
Principal Systems Engineer Software Integration BAE Systems PlcPrincipal Systems Engineer Software IntegrationRockville, MD$118,095–$200,762 / yearAbout BAE Systems Intelligence & Security BAE Systems, Inc. is the U.S. subsidiary of BAE Systems plc, an international defense, aerospace and security company which delivers a full range of products and services for air, land and naval forces, as well as advanced electronics, security, information technology solutions and customer support services. Job Description BAE Systems is seeking a Principal Systems Engineer with a strong software focus for System Integration efforts in support of our work as a prime contractor on a high-profile U.S. Navy weapon system.
Principal Firmware Reverse Engineer (AI-Assisted) BigBear.aiPrincipal Firmware Reverse Engineer (AI-Assisted)Columbia, MDBigBear.ai is seeking a Principal Firmware Reverse Engineer focused on advancing reverse engineering capabilities through AI-assisted tooling and automation. Design and implement tooling enhancements to support reverse engineering workflows for firmware, embedded systems, and application software.