Sr Information Systems Security Officer - TS/SCI Poly required

Senior Information Systems Security Officer (ISSO)

Location: Annapolis Junction, MD
Clearance Required: TS/SCI with Polygraph
Telework: Based on tasking

About the Role

We’re seeking a Senior ISSO to support a newly awarded contract and play a key role in strengthening and maintaining the security posture of mission‑critical systems. In this role, you’ll support the full lifecycle of information assurance activities—from policy development and risk assessments to documentation, configuration management, and day‑to‑day security operations. If you’re a seasoned ISSO who thrives in high‑impact environments and enjoys collaborating with technical teams, users, and leadership, this opportunity offers both challenge and purpose.

What You’ll Work On

• Supporting the organization’s information assurance program across systems, enclaves, and mission environments

• Helping propose, coordinate, implement, and enforce security policies, standards, and methodologies

• Maintaining the operational security posture of assigned systems

• Managing day‑to‑day security operations and supporting system security activities

• Evaluating security solutions to ensure compliance with classified processing requirements

• Performing vulnerability and risk assessments to support certification and accreditation

• Providing configuration management for security‑related software, hardware, and firmware

• Assessing the security impact of system changes and managing updates accordingly

• Preparing and reviewing key documentation, including:

  • System Security Plans (SSPs)

  • Risk Assessment Reports

  • Certification & Accreditation (C&A) packages

  • System Requirements Traceability Matrices (SRTMs)

• Supporting security authorization activities under NISCAP and DoD RMF

What You Bring

• Bachelor’s degree in Computer Science, Information Assurance, Information Security, or related field

  • In lieu of a bachelor’s degree, 4 additional years of related experience may be considered

• 12 years of related experience, including:

  • 7 years as an ISSO supporting IC or DoD programs of similar scope and complexity

• DoD 8570 compliance at IAM Level II or IAT Level III (CASP, CISSP, or Associate)

• Strong understanding of information assurance principles, system security engineering, and risk management

• Experience supporting certification, accreditation, and continuous monitoring activities

• Excellent communication skills and the ability to work effectively with technical teams and leadership

• Active TS/SCI with Polygraph