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Senior Information Systems Security Officer Security Clearance

Job in McLean, Fairfax County, Virginia, USA
Listing for: steampunk
Full Time position
Listed on 2026-08-26
Job specializations:
  • IT/Tech
    Cybersecurity, Information Security & Data Protection
Job Description & How to Apply Below
Position: Senior Information Systems Security Officer with Security Clearance
Overview Steampunk wants you to be a Senior Information Systems Security Officer (ISSO) on our team to support a government customer on site in Washington D.C. The primary responsibilities for the position are to support all activities that ensure the level of security documented with the security authorization is maintained at an acceptable level of risk. The nature of the work requires that the candidate demonstrate initiative, organization, responsibility, customer service skills, and the ability to be flexible and adaptive to a fast-paced, fluid business environment.

The candidate must be able to communicate effectively and decisively with all levels of the organization and be able to solve practical problems as well as exercise sound judgement with regards to sensitive and confidential information. Proactively create, monitor and update the status of POA&Ms to ensure weaknesses are resolved in accordance to their scheduled completion dates. Contributions Contributions
* Maintain compliance with the Risk Management Framework (RMF), NIST SP 800-53, DHS 4300A Sensitive Systems Policy, and other applicable federal security standards, ensuring system security posture aligns with current regulatory and organizational requirements
* Deliver responsive, customer-focused support to internal and external stakeholders on information system security matters, ensuring timely communication, clear guidance, and high-quality service throughout the ATO/security lifecycle
* Review and maintain current system security authorization artifacts, to include System Security Plan, Standard Operating Procedures, and other required system documentation
* Participate in Dev Sec Ops  (security integrated into Agile and Waterfall processes), system development lifecycle management, and security impact analysis throughout the lifetime of the system
* Provide support throughout all phases of annual security control assessments and audits (Financial, A-123, FISMA, DHS, internal, etc.), including preparation, execution, and follow-up activities, as well as responses to data calls
* Conduct recurring system self-assessments in support of the customer's Ongoing Authorization (OA) program
* Evaluate security control implementation against NIST SP 800-53 and RMF requirements in accordance with FISMA
* Identify risks and vulnerabilities and create, update, and monitor Plans of Action and Milestones (POA&M); create Waivers and Risk Acceptance Memos when needed
* Monitor and respond to Known Exploited Vulnerabilities (KEV) and patch management requirements in accordance with CISA directives and organizational risk management policies
* Coordinate with the customer's Privacy, Records, and Information Governance Divisions to ensure compliance documentation and related requirements are accurately maintained and up to date
* Facilitate and lead Security Integrated Product Team (IPT) meetings with Information System Owners and system teams
* Utilize enterprise scanning tools, Security Information and Event Management (SIEM) tools, Governance Risk and Compliance (GRC) tools, dashboards, approved AI tools, and Jira ticketing system to perform and track security activities
* Maintain accurate knowledge of system inventory within the accreditation boundary and ensure adherence to configuration management processes
* Participate in annual Contingency Plan tests and respond to events and incidents per the Incident Response Plan
* Respond to emerging requirements or policies as set by legislation, regulation, or policy Qualifications Required
* Masters degree and 4 years of cyber & FISMA experience; OR
* Bachelors degree and 5 years of cyber & FISMA experience; OR
* No degree and 9 years of experience, 7 of which must be cyber & FISMA
* Possesses one of the following professional security certifications:
* CISSP

* CASP

* CISM

* CEH

* CISA

* SSCP

* GISP

* GSLC
* Ability to hold and maintain DHS Public Trust
* Specialized knowledge of financial audit standards, classified system IA requirements and Privacy Act requirements
* Specialized knowledge and experience with the implementation of the NIST Special Publication (SP) 800 family of…
Position Requirements
10+ Years work experience
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