Senior IT Security Control Assessor
About The Position
Lead teams conducting FISMA security control assessments in accordance with NIST SP 800-53 and NIST SP 800-53A Support system authorization efforts across the RMF lifecycle Perform control testing, interviews, and evidence reviews for management, operational, and technical controls Document assessment results, findings, and risk determinations in SARs and related ATO artifacts Identify control gaps, weaknesses, and POA&M items with clear, actionable remediation guidance Coordinate with system owners, ISSOs, engineers, and program stakeholders during assessments Support continuous monitoring activities, including ongoing control assessments and ad hoc reviews Ensure assessments align with agency-specific cybersecurity compliance and information security policies Oversee team deliverable reviews, offering real-time feedback and coaching to improve quality and performance.
Requirements
- Bachelor’s degree in computer science, Information Technology, Cybersecurity, or related field
- Minimum of FIVE (5) years of experience in cybersecurity
- Must be able to OBTAIN and MAINTAIN a Federal or DoD "SECRET" security clearance ; candidates must obtain approved adjudication of clearance prior to onboarding with Guidehouse. Candidates with an ACTIVE "SECRET" or higher-level clearance are preferred.
- Demonstrated experience performing FISMA or RMF-based security control assessments
- Strong working knowledge of FISMA, NIST SP 800-53, NIST SP 800-53A, NIST SP 800-37
- Experience assessing cloud-based systems, including inherited controls
- Ability to clearly document technical and non-technical findings for audit-ready reporting
- Understanding of federal cybersecurity compliance requirements and governance processes
- Relevant certifications preferred (e.g., CISSP, CISA, CAP, GSLC)
- Team leadership experience
Nice To Haves
- Master’s Degree in in computer science, Information Technology, Cybersecurity, or related field
- Certified Information Systems Security Professional (CISSP)
- Knowledge of cloud security (FedRAMP)
- Experience with security tools (ACAS/Nessus, Splunk, etc.)
- Project management experience
Responsibilities
- Lead teams conducting FISMA security control assessments in accordance with NIST SP 800-53 and NIST SP 800-53A
- Support system authorization efforts across the RMF lifecycle
- Perform control testing, interviews, and evidence reviews for management, operational, and technical controls
- Document assessment results, findings, and risk determinations in SARs and related ATO artifacts
- Identify control gaps, weaknesses, and POA&M items with clear, actionable remediation guidance
- Coordinate with system owners, ISSOs, engineers, and program stakeholders during assessments
- Support continuous monitoring activities, including ongoing control assessments and ad hoc reviews
- Ensure assessments align with agency-specific cybersecurity compliance and information security policies
- Oversee team deliverable reviews, offering real-time feedback and coaching to improve quality and performance.
Benefits
- Medical, Rx, Dental & Vision Insurance
- Personal and Family Sick Time & Company Paid Holidays
- Position may be eligible for a discretionary variable incentive bonus
- Parental Leave and Adoption Assistance
- 401(k) Retirement Plan
- Basic Life & Supplemental Life
- Health Savings Account, Dental/Vision & Dependent Care Flexible Spending Accounts
- Short-Term & Long-Term Disability
- Student Loan PayDown
- Tuition Reimbursement, Personal Development & Learning Opportunities
- Skills Development & Certifications
- Employee Referral Program
- Corporate Sponsored Events & Community Outreach
- Emergency Back-Up Childcare Program
- Mobility Stipend
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Number of Employees
5,001-10,000 employees
