IT Security Control Assessor

Responsibilities

• Conduct 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 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

Requirements

• Bachelor’s degree in computer science, Information Technology, Cybersecurity, or a related field
• Minimum of three (3) years of experience in cybersecurity
• Ability to obtain and maintain a Federal or DoD "SECRET" security clearance
• Demonstrated experience performing FISMA or RMF-based security control assessments
• Strong working knowledge of FISMA, NIST SP 800-53, NIST SP 800-53A, and 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

Preferred Qualifications

• Master’s Degree in computer science, Information Technology, or Cybersecurity
• Relevant certifications such as CISSP, CISA, CAP, or GSLC
• Knowledge of cloud security and FedRAMP
• Experience with security tools like ACAS/Nessus or Splunk
• Project management experience

Benefits

• Medical, Rx, Dental & Vision Insurance
• 401(k) Retirement Plan and Health Savings Account
• Parental Leave and Adoption Assistance
• Student Loan PayDown and Tuition Reimbursement
• Skills Development & Certifications
• Paid Holidays and Sick Time

About the Company

Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors. We drive efficiency and resilience in the healthcare, financial services, energy, infrastructure, and national security markets.