Senior National Security Systems Security Control Assessor
Senior National Security Systems Security Control Assessor
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$ 104650 - 189175
1 Vacancy
Job Description
The mission of the DHS Chief Information Security Officer Directorate (DHS CISOD) is to support the Departments implementation of all applicable regulatory requirementsincluding the Federal Information Security Modernization Act (FISMA) relevant OMB circulars Executive Orders Federal laws directives policies and regulationswhile providing the Department of Homeland Security (DHS) a secure and trusted computing environment. Information security is an essential business function critical to enabling DHS to conduct its operations and deliver service to the public.
Leidos has a critical need for a Senior National Security Systems (NSS) Assessor to support the DHS Cyber Security Support Service Program. This role will execute security control assessments (SCAs) and provide risk analysis across highly sensitive NSS environments ensuring compliance with CNSS NIST and DHS standards. The Senior NSS Assessor will deliver expert guidance to government stakeholders and contribute to the continuous improvement of cybersecurity posture for mission-critical systems.
Primary Responsibilities
- Conduct security control assessments (SCAs) in accordance with the NIST Risk Management Framework (RMF) and CNSS policies standards and guidelines.
- Provide validation analysis and documentation of assessments for DHS NSS systems applications and appliances.
- Develop maintain and improve formal NSS assessment and compliance CONOPS and SOPs.
- Evaluate and update cybersecurity risk indicators including risks from emerging threats and vulnerabilities.
- Deliver risk recommendations and track remediation through POA&Ms and continuous monitoring processes.
- Author white papers and reports to identify trends adversary activity and systemic risks impacting DHS NSS.
- Support NSCD compliance engagements engineering review boards configuration control boards and C-SCRM efforts.
- Document lessons learned and provide training and guidance to NSS stakeholders.
Required Qualifications:
- Active Secret clearance.
- Bachelors degree and at least 8 years of related experience or Masters degree with at least 6 years of related experience.
- Strong knowledge of DHS IA policies CNSS guidance NIST RMF FISMA and related standards.
- Demonstrated experience with audits compliance and IT security review processes.
- Excellent written and verbal communication skills with proven ability to brief senior leadership.
- U.S. citizenship required.
Preferred Qualifications:
- Prior DHS IT security or audit experience.
- Experience supporting NSS or other high-security national mission environments.
- Familiarity with FedRAMP FIPS-140-2 and other federal compliance frameworks.
At Leidos we dont want someone who fits the moldwe want someone who melts it down and builds something better. This is a role for the restless the over-caffeinated the ones who ask whats next before the dust settles on whats now.
If youre already scheming step 20 while everyone else is still debating step 2 good. Youll fit right in.
Original Posting:
September 8 2025For U.S. Positions: While subject to change based on business needs Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.
Pay Range:
Pay Range $104650.00 - $189175.00The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job education experience knowledge skills and abilities as well as internal equity alignment with market data applicable bargaining agreement (if any) or other law.
Required Experience:
Senior IC
Employment Type
Full-Time
