We're hiring Senior NIST 800-53A Security Control Assessors for multiple federal assessment projects kicking off between This is NOT a general GRC or compliance role. We are specifically looking for professionals who have hands-on experience executing full NIST 800-53A assessments, not just mapping controls or supporting audits. What you'll actually be doing: • Developing Security Assessment Plans (SAP) with defined testing procedures (Inspect / Interview / Test) • Conducting control assessments across all control families (technical + administrative) • Interviewing control owners and validating implementation statements in SSPs • Performing evidence-based testing (logs, configurations, artifacts) • Writing Security Assessment Reports (SAR) with formal findings and risk ratings • Building POA&M entries tied to identified control deficiencies 🚫 Not a fit if your experience is limited to SOC 2, ISO 27001, or third-party risk management without hands-on 800-53A assessment execution. Requirements What we're looking for: • 5+ years of direct experience performing NIST 800-53A assessments • Proven ownership of SAP and SAR deliverables • Strong experience designing and executing control testing procedures • Background in RMF, FedRAMP, FISMA, or CMS ARS frameworks • Ability to independently validate controls beyond documentation review Nice to have: • Experience with CMS ARS / ARC-AMPE baseline • Strong Excel-based evidence mapping and tracking Benefits As a lean, growing firm, we prioritize results over red tape, offering you a direct seat at the table and a clear path for career progression as we scale. You won't be just a number here; you'll have the autonomy to make a visible impact on the business from day one.