---
title: "Lead Information System Security Officer (ISSO)"
company: "C3EL"
company_url: "https://www.remjobs.works/companies/c3el"
url: "https://www.remjobs.works/job/c3el-lead-information-system-security-officer-isso-233f2475-8aea-4fe3-a184-7e92db6dcb86"
apply_url: "https://job-boards.greenhouse.io/c3el/jobs/5225427007"
workplace: onsite
location: "Washington, D.C."
employment_type: unspecified
seniority: lead
role: devops-infrastructure
region: united-states
date_posted: 2026-09-02T21:14:40.000Z
first_seen_by_remjobs: 2026-09-15T19:02:51.992Z
---

# Lead Information System Security Officer (ISSO)

**C3EL** · Washington, D.C.

Apply: https://job-boards.greenhouse.io/c3el/jobs/5225427007

## About the role

##### **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.)

---

Source: C3EL's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/c3el-lead-information-system-security-officer-isso-233f2475-8aea-4fe3-a184-7e92db6dcb86