Lead Information System Security Officer (ISSO)
- Location
- Washington, D.C.
- Work mode
- On-site
- Employment type
- Full-time
About the job
**CONTINGENT UPON CONTRACT AWARD**
Overview:
Job Title: Lead Information System Security Officer (ISSO)
Security Clearance: Ability to Obtain Tier 4 High-Risk Public Trust
Location : Washington, D.C.
(Due to the nature of the work and contract requirements, U.S. Citizenship is required. )
Description:
C3EL is seeking a Lead Information System Security Officer (ISSO) to provide on-site cybersecurity and Risk Management Framework (RMF) sustainment support in Washington, D.C., for a new contract. This role will serve as the single point of accountability for technical performance and remain a hands-on cybersecurity practitioner as the technical leader, Government interface, and quality authority for the entire ISSO program.
Responsibilities will include, but not be limited to:
- Provide on-site cybersecurity and RMF sustainment support.
- Chair internal quality reviews and ensure deliverables are complete, current, consistent, timely, and audit ready.
- Manage technical risks, issues, escalations, SLA/KPI/AQL performance, action items, and corrective actions.
- Support weekly reports, monthly status reports, and quarterly executive reviews, including authorization, vulnerability, POA&M, audit, and staffing status.
- Lead a team of two Senior ISSOs and maintain coverage during absence, vacancy, surge, or suitability delay.
- Produce accurate, concise, and audit-ready Government cybersecurity documentation.
- Support team coverage from 7:00 a.m. to 6:00 p.m. ET (M-F) and participate in after-hours incident coverage as needed.
Minimum Qualifications:
- U.S. Citizenship.
- Eligibility to obtain a Tier 4 High-Risk Public Trust.
- Minimum ten (10) years in cybersecurity.
- Minimum seven (7) years in federal RMF/ISSO work.
- Minimum three (3) years leading ISSO or authorization teams.
- Hands-on CSAM experience supporting system profiles, controls, evidence, POA&Ms, and authorization workflows.
- Working knowledge of NIST SP 800-37, 800-53, 800-53B, FIPS 199, FISMA, and applicable CISA/OMB guidance.
- Familiarity with GRC, ITSM, SIEM, scanner, identity, endpoint, and cloud-security platforms.
- Direct experience briefing and coordinating with ISSMs, CISOs, AOs, AODRs, System Owners, assessors, and senior Government officials.
- Direct experience overseeing SSPs, SAPs, SARs, POA&Ms, risk assessments, control statements, and evidence packages.
- Expert knowledge of all seven RMF steps, ATO, reauthorization, ongoing authorization, control baselines, and inheritance.
- Working proficiency with ServiceNow, Splunk, and vulnerability-scanning platforms.
Preferred Qualifications:
- At least one current cybersecurity certification such as CISSP, CGRC, CISM, CRISC, Security+, SecurityX, CCSP, or GIAC.
Education:
- Associate’s degree in Cybersecurity, Information Technology, or related field. (Relevant experience may be considered in lieu of formal education.)
From C3EL's careers page (Greenhouse), checked 29 Oct 2026.
How to apply
- Select Apply on job-boards.greenhouse.io. It opens C3EL's own application form in a new tab, run on Greenhouse.
- Fill in the form and upload your résumé there. Jobiwork never sees your application.
- C3EL will reply to you directly. No real employer asks you for money to apply.
Posted 2 Sept 2026 · checked 29 Oct 2026 · Report this job