Principal Endpoint Security Systems Engineer Leidos Holdings Inc.Principal Endpoint Security Systems EngineerBethesda, MD$131,300–$237,350 / yearWorking in a hybrid cloud/on-prem mission environment the engineer will support integration of Linux and Windows hosted mission systems with the endpoint security product and maintaining the scan policies to ensure proper protection of mission systems from external threats. Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management.
Information Security Systems Engineer (RHEL Focus) UltraViolet CyberInformation Security Systems Engineer (RHEL Focus)Herndon, VirginiaFounded and operated by security practitioners with decades of experience, the UltraViolet Cyber security-as-code platform combines technology innovation and human expertise to make advanced real-time cybersecurity accessible for all organizations by eliminating risks of separate red and blue teams. UltraViolet Cyber is seeking a Security Engineer who will provide Security Operations Center (SOC) engineering support and guidance to the teams and the client that improve the client’s cybersecurity posture, to include the confidentiality, integrity, and availability of information systems by identifying, verifying, and understanding cyber events.
Field Engineer External OST CareersField EngineerMc Lean, VirginiaDemonstrated ability to think outside the box at an engineering level, developing sound solutions to unanticipated field conditions, and a willingness to go the additional mile to complete the installation and satisfy the customer. Ability to obtain and maintain an FAA security clearance, including the required suitability determination, background investigation, and facility access credentials for work within the National Airspace System (NAS).
Systems Engineer VTGSystems EngineerMcLean, VirginiaFull timeThe position requires hands-on systems engineering and administration experience across Windows infrastructure, databases, Active Directory services, virtualization, and Linux environments. Overview: VTG is seeking an experienced Systems Engineer to support Windows and Linux enterprise environments and security-controlled systems.
Dev(Sec)Ops Developer/Engineer CSIDev(Sec)Ops Developer/EngineerReston, VirginiaCloud: Amazon Web Services (e.g., Commercial and Government Cloud Services for DoD and IC, EMR w/Spark and RDS, EC2, EBS, S3, Route 53, RDS, VPC, ELB, CloudWatch, CloudFormation, CloudTrail, Blue Green deployment, Auto scaling, Trusted Advisor, Identity & Access Management, Simple Notation Service, Billing Console), Microsoft Azure. Certifications: We prefer one or more of the following certifications: AWS Cloud certifications (e.g., AWS Certified Cloud Practitioner, AWS Certified SysOps Administrator, AWS Certified DevOps Engineer, AWS Certified Big Data, AWS Solutions Architect); Microsoft Azure certifications; Professional Cloud Solutions Architect.
Senior IT Systems Engineer Compu-Vision Consulting Inc.Senior IT Systems EngineerColumbia, MDThe Senior SE recommends and oversees the configuration of operating systems and system applications, investigating and analyzing feasibility of system requirements, developing system specifications, and identifying advanced methods and solutions to ensure a high level of service to the customers of Columbia Association's (CA) Information Technology (IT) division. Experience Strong technical and analytical background and experience in desktop/server configuration and integration - sufficient to allow for performance as single technical security support or as a lead in a security systems team.
CORE/WAN Network Lead CACICORE/WAN Network LeadSterling, VirginiaAs a leader in our networking team, you will be responsible for guiding and developing our workforce, spearheading problem-solving efforts for critical network issues, fostering collaboration among team members, and driving continuous improvement through staying current with industry innovations. 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.
Hardware Engineer Nightwing Intelligence SolutionsHardware EngineerSterling, Virginia$122,000–$253,000 / yearThe HWE supports system infrastructure build-outs (cage builds, overhead installations, rack and stack), cable termination and testing, maintenance work, monitoring and responding to mechanical, electrical, fire protection, telecom, and security systems. The HWE performs daily system data center rounds to monitor the data center infrastructure, coordinate response to operational incidents, and partner with other providers to rapidly resolve issues that impact service availability.
Senior Microsoft Cloud Security Engineer/Architect (On-Site) GroundswellSenior Microsoft Cloud Security Engineer/Architect (On-Site)McLean, VirginiaGroundswell is seeking an experienced, hands-on Cybersecurity Specialist to serve as the senior on-site technical support for cybersecurity operations, Microsoft Azure Government, Microsoft 365 GCC High, cloud infrastructure, identity, endpoint security, networking, and incident response. Lead AvePoint backup and recovery for Microsoft 365 GCC High, including monitoring jobs, resolving failures, testing restores, and maintaining recovery practices for Exchange, SharePoint, OneDrive, and Teams.
Principal Security Engineer Fannie Mae CorpPrincipal Security EngineerReston, VADeep knowledge of cloud security architecture, IAM, networking, encryption, logging, monitoring, workload protection, governance, and enterprise network security, including segmentation, firewalls, proxies, VPNs, DNS security, secure web gateways, IPS, load balancing, ZTNA, and SASE. Professional Certifications: Relevant industry certifications such as CISSP, CCSP, PCNSE, AWS Certified Security- Specialty, AWS Certified Advanced Networking- Specialty, Google Professional Cloud Security Engineer, Microsoft Certified: Azure Security Engineer Associate, GIAC certifications, or equivalent credentials.
NewSr. Specialist, Systems Engineering L3Harris TechnologiesSr. Specialist, Systems EngineeringMillersville, MD$106,500–$197,500 / yearCollaborate with other Systems Engineers in the development of work products, including: System Specifications, Logically Derived and Linked Requirements, Interface Definitions, System Diagrams, Systems Analyses, Trade Studies, and Detailed Designs. With customers’ mission-critical needs always in mind, our employees deliver end-to-end technology solutions connecting the space, air, land, sea and cyber domains in the interest of national security.
Network Engineer - TS/SCI with Poly Staffed4UNetwork Engineer - TS/SCI with PolyMarylandAs part of the infrastructure team, you will play a key role in designing, implementing, maintaining, and troubleshooting secure and scalable networks across classified and high-performance computing (HPC) environments. This role supports complex computing environments, involving high-speed data transport, system interconnectivity, and integration of advanced technologies in support of real-world mission success.
Network Engineer - AI Experience - Senior ACKtive Engineering Solutions LLCNetwork Engineer - AI Experience - SeniorLinthicum Heights, MD$310,271.70–$360,638.94 / yearFull timeMaintain, monitor, troubleshoot, and dianose and resolve problems with Cisco ASA firewalls, Cisco Intrusion Detection/Prevention Systems, Cisco VPNs, Cisco 3750 series switches, and Cisco management applications. Strong AI skills across other disciplines who could provide expertise to the wide-ranging AI issues aworking group is looking to tackle (software development, hardware engineering, systems engineering, etc).
Network Engineer CbNetwork EngineerWashington, District of ColumbiaThe role involves managing both wide area networks (WAN) and local area networks (LAN), ensuring optimal performance, and supporting applications programmers working within the telecommunications environment. Overview: We are seeking a skilled Network Engineer with strong leadership skills to design, configure, test, implement, and maintain our telecommunications infrastructure.
Senior Network Engineer Abile Group, Inc.Senior Network EngineerQuantico, VirginiaAbile Group, founded in July 2004 to support the Intelligence Community and its contractors across Enterprise Analytics, IT & Systems Engineering, and Program & Project Management, merged with Valiant Solutions in January 2026 - an established provider of cybersecurity technologies and services for Federal Agencies since 2005. With significant experience serving the Federal Government, we remain dedicated to our employees and clients and seek high‑performing professionals who excel at providing guidance, developing solutions, and delivering implementation support that blends industry best practices with client expertise and Abile’s broad technical capabilities.
Network Engineer NewGen TechnologiesNetwork EngineerArlington, VirginiaBS Computer Science, Computer Engineering, Computer Information Systems, Computer Systems Engineering or related degree; or HS Diploma and 7+ years network administration, network engineering or systems administration experience. Diagnose and resolve complex enterprise storage issues across local and wide area networks, including replication strategy support and remediation of storage-related incidents.
Network Engineer Abile Group, Inc.Network EngineerSpringfield, VirginiaWith significant experience serving the Federal Government, we remain dedicated to our employees and clients and seek high‑performing professionals who excel at providing guidance, developing solutions, and delivering implementation support that blends industry best practices with client expertise and Abile’s broad technical capabilities. Abile Group, founded in July 2004 to support the Intelligence Community and its contractors across Enterprise Analytics, IT & Systems Engineering, and Program & Project Management, merged with Valiant Solutions in January 2026 - an established provider of cybersecurity technologies and services for Federal Agencies since 2005.
Information Systems Security Engineer (ISSE) Dobbs Defense Solutions, LLCInformation Systems Security Engineer (ISSE)Landover, MDThis role partners closely with system administrators, network engineers, Information System Security Officers (ISSOs), and application teams to strengthen cybersecurity posture, support continuous monitoring, and protect mission-critical systems. Hands-on experience administering Tenable Nessus, CyberArk, Trellix, Splunk Enterprise, VMware vSphere, GitLab, Microsoft Windows Server, Red Hat Enterprise Linux, and Ubuntu Linux.
DevOps Engineer NewGen TechnologiesDevOps EngineerHerndon, VirginiaYou will be trained in DevOps and work alongside a collaborative team of Software Developers, Systems Development Engineers, Network Engineers, and Data Engineers to develop unique software that enables customer networks to safely operate at scale. Our team of Highly Cleared Specialists have hard-to-find skills and expertise in a wide spectrum of technologies to provide solutions that transform business processes and solve problems of national significance.
Senior Information Systems Security Engineer (ISSE) Amatriot Group, LLCSenior Information Systems Security Engineer (ISSE)Annapolis Junction, MD$150,000–$210,000 / yearImplement security systems by specifying intrusion detection methodologies and equipment, directing equipment and software installation and calibration, preparing preventive and reactive measures, creating, transmitting, and maintaining keys, providing technical support, and completing documentation. This role performs security engineering across the system development lifecycle, supports vulnerability management, integrates cybersecurity requirements across enterprise environments, and ensures development and operational systems are functional and secure.