Senior Information System Security Officer - RMF & A&A Lead

AMERICAN SYSTEMS; Ashburn (VA); On-site; USD 111,000 - 185,000; Full time

Job summary

AMERICAN SYSTEMS is seeking an Information System Security Officer (ISSO) in Ashburn, VA to support a Network Operations Center and manage the A&A lifecycle, continuous monitoring, and security documentation for multiple FISMA systems. The role requires RMF/NIST expertise, experience with ATO/POA&Ms, vulnerability management, and coordination with government program managers and security stakeholders.

A Bachelor's degree in cybersecurity or related field is preferred; security certifications are

Qualifications

• Experience with RMF, NIST, FISMA, DHS 4300A, and HB 1400-05D.
• Experience implementing or assessing NIST SP 800-53 controls and supporting A&A/ATO/continuous-monitoring.
• Experience reviewing vulnerability scans, tracking ISVMs, and developing POA&Ms.
• Experience maintaining SSPs, security assessments, risk assessments, and contingency plans.
• Bachelor’s degree or equivalent experience in a related field.
• Understanding of enterprise networking concepts and configurations.
• Ability to work with Government and customer organizations and communicate security issues clearly.

Responsibilities

• Lead A&A, reaccreditation, and continuous-monitoring for assigned information systems.
• Coordinate reaccreditation kickoff activities with the agency’s Security Authorization Team.
• Support transition to Ongoing Authorization and continuous monitoring.
• Manage POA&Ms including remediation tracking and status reporting.
• Review ISVMs and vulnerability reports; coordinate remediation.
• Maintain asset inventories and update SSPs as systems/configurations change.
• Prepare A&A and security documentation for Government approvals.

Skills

RMF Knowledge

NIST Publications

A&A Experience

Vulnerability Mgmt

Security Docs

Teamwork

Communication

Education

Bachelor’s Degree in Cybersecurity

Tools

Nessus

Job description

AMERICAN SYSTEMS is seeking an Information System Security Officer (ISSO) in Ashburn, VA to support a Network Operations Center and manage the A&A lifecycle, continuous monitoring, and security documentation for multiple FISMA systems. The role requires RMF/NIST expertise, experience with ATO/POA&Ms, vulnerability management, and coordination with government program managers and security stakeholders.

A Bachelor's degree in cybersecurity or related field is preferred; security certifications are