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ManTech Cyber Defense Network Security Engineer (Polygraph Clearance) in Herndon, Virginia

Secure our Nation, Ignite your Future

Become an integral part of a diverse team in the Mission, Cyber and Intelligence Solutions (MCIS) Group. Currently, ManTech is seeking a motivated, mission oriented Cyber Defense Network Security Engineer l ocated in the Herndon, VA area with strong customer relationships. At ManTech, you will help protect our national security while working on innovative projects that offer opportunities for advancement.

The NIS Division provides mission solutions to a wide range of Defense and Intelligence Community customers. This division consists of a team of technical leaders that deliver advanced technical solutions to government organizations. Our customers have high standards, are technically adept, and use our products daily to support their mission of protecting national security. Our contributions to our customers success is driving our growth.

Responsibilities include, but are not limited to:

  • Assess network/cloud security posture and recommend modifications for enhancement or improvement

  • Communicate vulnerability findings to management and partners

  • Design, configure, and maintain network monitoring and management tools

  • Design, configure, and maintain network modeling tools

Skills / Knowledge / Abilities:


  • Bachelor’s degree in computer science, computer engineering, us minimum 10 years of experience.

  • Demonstrate a clear understanding of cloud computing services/deployment architecture

  • Experience in identifying security issues and risks, and developing mitigation plans

  • Experience in network, system, or software architecture; design, implementation, support, and evaluation of security-focused tools and services

  • Excellent problem solving skills

  • Excellent verbal and written communication skills


  • Experience building enterprise security strategy for cloud adoption or driving the program's evolution to meet new requirements

  • Demonstrate innovative security approaches in non-traditional IT environments

  • Experience with enterprise security solutions such as WAF, IDS/IPS, and/or SIEM

  • Solid understanding of encryption technologies and principles

Security Clearance Requirements: Active TS/SCI w/ Polygraph


ManTech International Corporation, as well as its subsidiaries proactively fulfills its role as an equal opportunity employer. We do not discriminate against any employee or applicant for employment because of race, color, sex, religion, age, sexual orientation, gender identity and expression, national origin, marital status, physical or mental disability, status as a Disabled Veteran, Recently Separated Veteran, Active Duty Wartime or Campaign Badge Veteran, Armed Forces Services Medal, or any other characteristic protected by law.

If you require a reasonable accommodation to apply for a position with ManTech through its online applicant system, please contact ManTech's Corporate EEO Department at (703) 218-6000. ManTech is an affirmative action/equal opportunity employer - minorities, females, disabled and protected veterans are urged to apply. ManTech's utilization of any external recruitment or job placement agency is predicated upon its full compliance with our equal opportunity/affirmative action policies. ManTech does not accept resumes from unsolicited recruiting firms. We pay no fees for unsolicited services.

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