# Lead Information System Security Officer (ISSO) at C3EL

> United States · Staff · Security · open. Source: https://alderhq.app/jobs/greenhouse%3Ac3el%3A5225427007 (read 2026-11-09).

## Facts (observed)

- Company: [C3EL](https://alderhq.app/companies/c3el)
- Location text: Washington, D.C.; Customer Site
- Where it can be done from (inferred): United States (evidence: "Location: Washington, D.C.; Customer Site")
- Posted: 2026-09-02 (67 days ago)
- First seen by alder: 2026-11-04 · last verified: 2026-11-07
- Reposted: 0 times · edited: 0 times
- Apply on the employer's site: https://job-boards.greenhouse.io/c3el/jobs/5225427007

## Pay and sponsorship

- Posted pay: not posted

## Description (the employer's text)

### \*\*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.)

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Data: alder (https://alderhq.app). Cite https://alderhq.app/jobs/greenhouse%3Ac3el%3A5225427007 and the date you read it. Observed facts come from the employer's own listing; location reach, level, family and skills are inferences.