Information Systems Security Officer - Senior

Accenture Federal Services•Washington, DC

14h•Onsite

About The Position

The Senior ISSO will provide security governance and compliance oversight for critical systems, ensuring adherence to federal security requirements and maintaining continuous authorization. This role leads the development, review, and maintenance of key security artifacts including System Security Plans (SSPs), Security Assessment Reports (SARs), and POA&Ms. The ISSO navigates frameworks such as NIST 800-series, FedRAMP, FISMA, and RMF to guide system owners through security compliance activities and ATO preparation.

Requirements

Bachelor’s degree (required)
Minimum 8 years of cybersecurity or ISSO experience
Experience with a GRC tool (XACTA or JCAM preferred)
Experience with vulnerability management, log review, and security control assessment
Strong knowledge of RMF, FISMA compliance, and federal security documentation
US Citizen (no dual citizenship)
Active TS clearance with SCI eligibility (TS/SCI)
Ability to work on-site as required

Nice To Haves

Certifications such as CISSP, CISM, Security+, CAP
Experience with cloud environments (on-prem, AWS, Azure)
Experience supporting security audits in a federal agency environment
Familiarity with SIEM and EDR platforms
Experience developing and delivering security awareness training

Responsibilities

Create and maintain FISMA-required documentation, including SSPs and SARs
Develop and manage POA&Ms, providing guidance on mitigation strategies
Prepare and submit ATO packages in alignment with NIST, FedRAMP, FISMA, and RMF requirements
Conduct ongoing review and analysis of network and application vulnerability and compliance scans
Lead vulnerability review meetings and provide actionable insights to leadership
Ensure systems align with security policies and comply with federal standards
Collaborate with OCIO, system owners, and administrators to resolve findings and maintain security posture