Senior Information System Security Officer (TS SCI) - Placement

Job#: 3041514

Job Description:

Senior Information System Security Officer Location

Washington, DC (Hybrid)

This position is currently 100% remote. However, candidates must be located within a local radius of Washington, D.C., and be available to come onsite occasionally if requested.

PLEASE NOTE:

Candidates must be able to obtain and/or maintain a Department of Defense Secret TS/SCI security clearance as a condition and continuation of employment* (sponsorship unavailable)

We are seeking a Senior Information System Security Officer to support a federal government client. This role involves leading efforts to remediate and stabilize a security environment that has been neglected. The primary goals are to clean up existing security and compliance issues and increase automation. The successful candidate will be part of a team responsible for managing security controls across approximately 90 systems, focusing on enterprise-wide control families rather than individual system ownership.

• Lead the Risk Management Framework (RMF) lifecycle and the development of Authority to Operate (ATO) packages from start to finish.
• Manage and oversee Plans of Action and Milestones (POA&M), vulnerability remediation, and continuous monitoring activities.
• Provide hands‑on support for incident response, threat assessments, and investigations.
• Develop and maintain System Security Plans (SSPs), Configuration Management Plans, Contingency Plans, and Incident Response Plans.
• Conduct risk assessments, annual security assessments, and vulnerability assessments.
• Lead security audits, accreditation efforts, and compliance reviews to ensure adherence to federal standards.
• Support the integration of security throughout the System Development Life Cycle (SELC) by working with development teams.
• Perform security architecture reviews and contribute to the design of secure solutions.
• Brief leadership on security posture and mentor junior ISSO staff.

Education and Experience:

• Bachelor's degree with 10 years of experience, OR
• Associate's degree with 13 years of experience, OR
• 16 years of experience with no degree.

Technical Skills and

Certifications:

• Must hold one of the following:
  Certified Information System Security Professional (CISSP), Certified Information Security Manager (CISM), or CompTIA Advanced Security Practitioner (CASP+).
• Deep expertise in FISMA, NIST, and DHS 4300A compliance frameworks.
• Experience with GRC tools such as Xacta IA Manager and/or CSAM.
• U.S. Citizenship is required for this position.
• Experience supporting federal systems in a hands‑on and leadership capacity.

• Previous DHS or DoD experience.
• Experience with Supply Chain Risk Management.
• Experience with GRC tools such as Reg Scale or eMASS.
• Knowledge of Intelligence Community directives.
• Experience supporting emergency operations or disaster response missions.
• Strong communication skills for presenting to senior leadership.

• Everforth Apex offers a range of supplemental benefits, including medical, dental, vision, life, disability, and other insurance plans that offer an optional layer of financial protection.
• We offer an ESPP (employee stock purchase program) and a 401K program which allows you to contribute typically within 30 days of starting, with a company match after 12 months of tenure.
• Everforth Apex also offers a HSA (Health Savings Account on the HDHP plan), a Support Linc Employee Assistance Program (EAP) with up to 8 free counseling sessions, a corporate discount savings program and other discounts.
• In terms of professional development, Everforth Apex hosts an on-demand training program, provides access to certification prep and a library of technical and leadership courses/books/seminars once you have 6+ months of tenure, and certification discounts and other perks to associations that include CompTIA and IIBA.
• Everforth Apex has a dedicated customer service team for our Consultants that can address questions around benefits and other resources, as well as a certified Career Coach.
• You can access a full list of our benefits, programs, support teams and resources…