Senior ISSO

Company: TestPros
Location: Washington
Posted on: April 2, 2026

Job Description:

Company Overview TestPros is a successful and growing business, established in 1988 to provide Information Technology (IT) technical support services to a wide range of Commercial and U.S. Federal, State, and Local Government customers. Our capabilities include Program Management, Program Oversight, Process Audit, Intelligence Analysis, Cyber Security, NIST SP 800-171 Assessment and Compliance, Computer Forensics, Software Assurance, Software Testing, Test Automation, Section 508 and WCAG Accessibility Assessment, Localization Testing, Independent Verification and Validation (IV&V), Quality Assurance (QA), Compliance, and Research and Development (R&D) services. TestPros is an Equal Opportunity Employer. TestPros delivers innovative independent IT assessment solutions to critical challenges facing the nation and the world. We support the U.S. Federal Government and Commercial clients within the continental USA. TestPros is dedicated to making lives better, safer and more secure. Location : Washington, DC (hybrid – onsite meetings required) Clearance : Must pass GPO Public Trust background check; US Citizenship required Responsibilities : Provide continuous Assessment and Authorization (A&A) support to GPO’s Information System Security Officer (ISSO) Develop and maintain RMF documentation, including POA&Ms, ATO packages, and artifacts in compliance with NIST SP 800-53 and FISMA Utilize Xacta 360 and ServiceNow to manage RMF artifacts and workflows Support GPO in risk analysis, security control implementation, and audit response Coordinate with GPO Security, Architecture, and Engineering teams to ensure security posture and compliance Attend scheduled and as-needed in-person meetings at GPO headquarters Qualifications : Minimum of 3 years’ experience with RMF in a Microsoft GCC-H or GCC environment Experience using Xacta 360 to manage RMF packages Strong knowledge of NIST SP 800-53, FISMA, and federal cybersecurity compliance Familiarity with ServiceNow and continuous monitoring best practices Federal experience, GPO experience a plus Benefits and Perks TestPros offers competitive salary, medical/dental/vision insurance, life insurance, 3 weeks of paid vacation, 2 weeks of paid federal holidays, education/training and professional certifications, 401(k) retirement plan with up to 4% company match, opportunities for professional growth and much more! All benefits are per TestPros current policies and are subject to change without notice. Benefits are available to full-time employees only.

Keywords: TestPros, Arlington , Senior ISSO, IT / Software / Systems , Washington, Virginia