ISSO Assessor

Job Overview Systems Engineering Services is seeking an ISSO Assessor based in the Rockville, MD area. This position requires work in office and is a hybrid role (3 days in office / 2 days remote) with a Public Trust clearance requirement. Key Responsibilities Conduct security control assessments in accordance with NIST RMF, NIST SP 800‑53, and FedRAMP requirements Perform vulnerability testing, control validation, and security assessments across federal systems Document assessment findings, develop POA&M, and track remediation efforts Collaborate with system owners and ISSOs to ensure controls are properly implemented and maintained Support ATO package development, continuous monitoring activities, and authorization boundary definition Utilize ServiceNow for ticketing, workflow, and A&A documentation (integration experience highly valued) Provide recommendations to improve the client’s security posture and streamline assessment processes Required Qualifications 3+ years of experience performing security assessments or A&A work in a federal environment Strong working knowledge of NIST SP 800‑53, NIST RMF (800‑37), and federal authorization processes Experience with vulnerability scanning, control testing, and POA&M management Ability to obtain and maintain a Public Trust clearance (U.S. Citizenship required) Strong written and verbal communication skills with the ability to produce clear, professional assessment documentation Willingness to work hybrid schedule (3 days onsite in Rockville, MD) Preferred Qualifications Prior experience supporting NIH, HHS, or other health-related federal agencies Hands‑on experience with ServiceNow GRC / ITSM modules for A&A workflows Familiarity with Tenable, Microsoft Defender for Endpoint, or similar security tools Experience supporting large portfolios of systems and managing multiple ATOs simultaneously CISSP, CISM, CAP, or similar security certification #J-18808-Ljbffr Secretaria de Serviços Prefeitura de São Paulo