Penetration Tester III Agile DefensePenetration Tester IIISpringfield, VirginiaThis senior level cyber TE analysts engage with senior leadership to identify, report, and perform real-world threat activity simulation attacks, such as those used by our nation’s adversaries, in order to train and measure the effectiveness of the people, processes, and technology used to defend Agency networks and systems. Strong proficiency Report writing – a technical writing sample and technical editing test will be required if the candidate has no prior published intelligence analysis reporting, excellent verbal and written communications skills and ability produce clear and thorough security incident reports and briefings.
Network Engineer - TS/SCI with Poly TalentOpsNetwork 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 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.
Senior Network Engineer - TS/SCI ParsonsSenior Network Engineer - TS/SCICentreville, VirginiaEngineer and sustain hybrid connectivity between on-premises networks and Microsoft Azure, including VPN gateways, ExpressRoute, virtual network (VNet) architecture, routing, and network security groups in coordination with the cloud engineering team. In this role, you will design, implement, secure, and sustain enterprise network infrastructure supporting classified hybrid environments that span on-premises data center and server room infrastructure as well as multiple cloud environments.
Senior Information Systems Security Engineer ManTech International CorpSenior Information Systems Security EngineerWashington, DC$141,500–$236,000 / year4 + years of focused experience in one or more of the following: computer network penetration testing and techniques; computer evidence seizure, computer forensic analysis, and data recovery; computer intrusion analysis and incident response, intrusion detection; computer network surveillance and monitoring; network protocols, network devices, multiple operating systems, and secure architectures. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories.
Network Deployment Engineer ManTech International CorpNetwork Deployment EngineerChantilly, VA$85,000–$141,600 / yearExperience with Microsoft Windows 2008/2012/2016/2019 Servers; Microsoft Windows 10; administering Microsoft Exchange, Active Directory, and workstation and server hardware; administering Microsoft Office 2010/2016; administering DNS, Group Policy, and PKI; administering vSphere, Horizon View, data backup, and antivirus software; basic networking including DHCP/TCPIP; experience with deploying workstation images; and experience with thin and/or zero clients. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories.
Network Operations Center- NOC Tier 1 and 2 CACINetwork Operations Center- NOC Tier 1 and 2Washington Dc, District of Columbia$86,600–$181,800 / yearJob Title: Network Operations Center- NOC Tier 1 and 2Job Category: Service Contract ActTime Type: Full timeMinimum Clearance Required to Start: TS/SCI with PolygraphEmployee Type: RegularPercentage of Travel Required:Type of Travel:* * * The Opportunity: Our focus includes the design, transition, operations, and continual service improvement to include tech modernization, tech refresh, activities associated with customer local area networks (LANs) and unified communication (UC) services.
Audio Visual Systems Engineer ManTech International CorpAudio Visual Systems EngineerAnnapolis Junction, MD$107,900–$179,400 / yearThere are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. Monitor, tune, and support basic existing AVMM devices (IPTV, Conference rooms of varying sizes and complexities) and network infrastructure to ensure stable, reliable, secure, and efficient AVMM operations.
NewStaff Network Engineer VisaStaff Network EngineerAshburn, VA$131,600–$210,300 / yearThis role is responsible for planning, designing, and implementing networked systems, including configurations, supporting and troubleshooting network problems, and coordinating with vendors for installation of routers, bridges, concentrators, and switches. Visa is a world leader in payments technology, facilitating transactions between consumers, merchants, financial institutions and government entities across more than 200 countries and territories, dedicated to uplifting everyone, everywhere by being the best way to pay and be paid.
Mid-Sr. Network Engineer TS/SCI Poly LeidosMid-Sr. Network Engineer TS/SCI PolyAnnapolis Junction, MD$92,300–$166,850 / yearWe are using Behavior Driven Development (BDD) and test automation tools alongside a full suite of team collaboration tools in providing system engineering, development, test, integration and operational support for a program that is injecting new technology and adding advanced capabilities, while continuing to support an on-going mission and operational system. Leidos is looking for a Mid-Senior Level Network Engineer to join a highly performing agile team using the Scaled Agile Framework (SAFe) methodology to support a large, complex, fast-paced program.
Senior Network Escalation Engineer - TS/SCI clearance JobotSenior Network Escalation Engineer - TS/SCI clearanceHerndon, VA$140,000–$200,000 / yearThe role leads complex technical escalations and Severity 1 incidents, performs root cause analysis and troubleshooting, and partners with engineering teams to resolve defects and develop long-term solutions. With a global customer base including all sectors, from Fortune 500 to up-and-coming startups, we over diverse product lines including, but not limited to, Cloud Services, Artificial Intelligence, Storage, Networking, Supercomputing, and Digital Transformation offerings.
NewTransport Network Automation Engineer JobotTransport Network Automation EngineerMONTGOMRY VLG, MD$120,000–$150,000 / yearThe ideal candidate combines deep enterprise networking expertise with strong network automation skills and will help improve the repeatability, reliability, security, and traceability of multi-site network deployments while reducing manual configuration and engineering effort. We are seeking an experienced Transport Network Automation Engineer to design, develop, and maintain an end-to-end network automation framework that transforms engineering designs into validated, device-specific configurations and controlled production deployments.
NewLead Network Engineer (WAN Design and Implementation) System OneLead Network Engineer (WAN Design and Implementation)Fairfax, VA$100–$120 / hourThis role will manage a team of seven network engineers across multiple time zones, drive technical decisions, and partner closely with customer stakeholders and engineering leadership to ensure successful delivery. Lead the design and implementation of a global Wide Area Network (WAN) and serve as the senior customer-facing technical authority for the program.
Senior Network Engineer LeidosSenior Network EngineerOdenton, MD$92,300–$166,850 / yearIf you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com . June 8, 2026 For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Network Engineering/Operations Site Lead LeidosNetwork Engineering/Operations Site LeadFort Belvoir, VA$116,350–$210,325 / yearThe successful candidate will understand enterprise networking and cybersecurity well enough to ask the right questions, assess risk, remove barriers, and make sound management decisions—but will rely on the technical expertise of the engineering team for detailed design and implementation. Experience with enterprise networking technologies and environments, including Cisco routing and switching, Palo Alto firewalls, Cisco Identity Services Engine (ISE), Cisco Unified Communications Manager (CUCM), Cisco Nexus, Cisco Application Centric Infrastructure (ACI), or similar platforms.
Network Engineer LeidosNetwork EngineerOdenton, MD$73,450–$132,775 / yearIdentify legacy service paths (i.e. dataflow, firewall rulesets, and ACLs) and develop strategies and designs for the to-be enterprise service capability to meet requirements while balancing security, sustainability, and maintainability. Partner with key stakeholders and technical experts to perform legacy environment discovery, assessing current capabilities, configurations, and unique requirements to develop a design and architecture leveraging approved design patterns. .
NewNetwork Discovery Lead LeidosNetwork Discovery LeadOdenton, MD$116,350–$210,325 / yearLeidos is seeking an experienced Network Discovery Lead to join our Defense Enclave Services (DES) team, who will support an extensive digital modernization program critical to Defense Information Systems Agency (DISA) and Department of Defense (DoD) Fourth Estate Agencies (DAFAs). The Network Discovery Lead will oversee a team of network engineers and analysts responsible for performing virtual and physical discovery of DAFA networks and associated analyses to establish a detailed network migration plan for each DAFA’s journey to the DoDNet environment.
Network Operation Watch Officer LeidosNetwork Operation Watch OfficerOdenton, MD$59,150–$106,925 / yearThe Network Operations Watch Officer will enable Command and Control (C2) of the Department of Defense Information Network (DODIN) by ensuring its overall health through 24/7 monitoring, directing, controlling, coordination, de-conflicting, synchronizing, and reporting the current connectivity status of the physical layer Transport supporting DODIN to DJOC Battle Captains and DISA Current Operations senior leaders. The agency provides, operates, and assures command and control and information-sharing capabilities and a globally accessible enterprise information infrastructure in direct support to joint warfighters, national level leaders, and other mission and coalition partners across the full spectrum of military operations.
Mid-Level OT/IT Network Engineer (Transportation) LeidosMid-Level OT/IT Network Engineer (Transportation)McLean, VA$110,000–$130,000 / yearThe Mid-Level OT/IT Network Engineer is a hands-on owner of STOL's network and connected-vehicle testbed infrastructure — designing, administering, securing, documenting, and troubleshooting the networks connecting lab systems, field sites, roadside infrastructure, edge platforms, and connected-vehicle devices. You'll also carry meaningful responsibility for the network's federal security authorization posture — security documentation, Authorization to Operate (ATO) and Risk Management Framework (RMF) artifacts, Plans of Action and Milestones (POA&Ms), and vulnerability remediation — in partnership with the program's cybersecurity and Corporate Information Security (CIS) team.
Photonics Scientist LeidosPhotonics ScientistArlington, VA$87,100–$157,450 / yearThe candidate will be responsible for developing and applying new approaches in integrated photonics on topics such as non-linear optics, electro-optics, frequency conversion, and single photon detection. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at LeidosCareersFraud@leidos.com .