IT - Security Jobs in Herndon, VA

Acclaim Technical Services, founded in 2000, is a leading language, operations, and technology services company supporting a wide range of U.S. Federal agencies. We are an Employee Stock Ownership Pla...

R-00172309Description At Leidos, we deliver innovative solutions through the efforts of our diverse and talented people who are dedicated to our customers’ success. We empower our teams, contrib...

MANTECH seeks a motivated, career and customer-oriented Lead Security & Compliance Manager (LSCM) to join our team in Herndon, VA. This is a hybrid position. This role is responsible for the overall ...

DirectViz Solutions (DVS) is a dynamic and rapidly growing government contractor committed to delivering innovative IT solutions that address the mission-critical needs of our government clients. Thro...

Mauck Research Group is a small cyber research and development company exploring emerging offensive and defensive cyber problems for our clients. DescriptionJob Title: Windows Cyber Tool Developer (TS...

Title: Information Systems Security Engineer Location: Herndon, VA *Clearance: *Active TS/SCI w/ Polygraph needed to apply * Company Overview: Cornerstone Defense, in partnership with our milita...

In a world of possibilities, pursue one with endless opportunities. Imagine Next! At Parsons, you can imagine a career where you thrive, work with exceptional people, and be yourself. Guided by our ...

*****MUST HAVE AN ACTIVE TS/SCI WITH CI POLY CLEARANCE****** Software Engineer III Principal Cyber Software Engineer (Front End/UI-Focused) Experienced front-end software engineer to develop servic...

About PeratonPeraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world's leading m...

Job Description: Senior Principal Cyber Systems Engineer (DevOps Engineer) The selected candidate will integrate a variety of software components in a secure container architecture working with cros...

MANTECH seeks a motivated, career and customer-oriented Cyber Security Analyst to join our team onsite in Herndon, VA or Reston, VA in support of a high-priority mission at one of our National Intelli...

CNO Developer--designs, develops, and tests offensive cyber tools, techniques, and integrated effects for computer network operations (CNO), a critical aspect of national security. These roles require...

The application window is expected to close on: 1/16/2026Job posting may be removed earlier if the position is filled or if a sufficient number of applications are received.The successful applicant w...

OverviewSilverEdge is a premier provider of innovative cyber, software, and intelligence solutions, addressing mission-critical challenges for the Department of Defense (DoD), Intelligence Community (...

About PeratonPeraton is a next-generation national security company that drives missions of consequence spanning the globe and extending to the farthest reaches of the galaxy. As the world's leading m...