Location
Washington, DC, United States
Posted
June 20, 2026
Job Description
**MANTECH** seeks a motivated, career and customer-oriented **Senior** **Information Systems Security Engineer (ISSE)** to join our team in **Washington, D.C.** This is an **onsite** position.
The Information Systems Security Engineer (ISSE) will leverage their strong technical background and knowledge to support accreditation efforts, to include responding to/implementing/documenting required controls, and completing required tasks/actions.
**Responsibilities include but are not limited to:**
+ Designing secure architectures, hardware, operating systems, and software applications to ensure cybersecurity requirements are adequately addressed for the IS and Network Environment.
+ Designing, developing, and implementing network security measures and specific countermeasures that provide confidentiality, integrity, availability, authentication, and non-repudiation.
+ Integrating and implementing security protocols with Cross Domain Solutions (CDS)...
The Information Systems Security Engineer (ISSE) will leverage their strong technical background and knowledge to support accreditation efforts, to include responding to/implementing/documenting required controls, and completing required tasks/actions.
**Responsibilities include but are not limited to:**
+ Designing secure architectures, hardware, operating systems, and software applications to ensure cybersecurity requirements are adequately addressed for the IS and Network Environment.
+ Designing, developing, and implementing network security measures and specific countermeasures that provide confidentiality, integrity, availability, authentication, and non-repudiation.
+ Integrating and implementing security protocols with Cross Domain Solutions (CDS)...