---
title: 'Senior Information System Security Officer (ISSO) at C3EL'
canonical: 'https://feeny.ai/job/senior-information-system-security-officer-isso-c3el-washington-4777twt7awts'
type: 'job'
last_seen: '2026-09-10'
---

# Senior Information System Security Officer (ISSO) at C3EL

- **Company:** C3EL
- **Location:** Washington, DC
- **Posted:** 2026-09-02
- **Last confirmed live:** 2026-09-10
- **Apply:** https://job-boards.greenhouse.io/c3el/jobs/5225490007

## Job description

## **CONTINGENT UPON CONTRACT AWARD**

Overview:

Job Title: Senior 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 Senior 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 Operational Specialist for Splunk, ServiceNow, ConMon, vulnerability management, POA&M, and incident and change coordination, as well as being workstream lead and secondary backup for Lead ISSO duties.

Responsibilities will include, but not be limited to:

- Provide on-site cybersecurity and RMF sustainment support.
- Maintain traceability between ServiceNow remediation tickets and CSAM POA&M records.
- Analyze findings, validate false positives, and prioritize remediation using CVSS, CISA KEV, exposure, exploitability, and mission impact.
- Support notification, triage, CSAM context retrieval, Splunk verification, SitReps, RCA, corrective actions, and post-incident updates.
- Support CAB/CCB/ERB reviews, security impact analysis, artifact updates, and post-change verification.
- Track audit, penetration-test, and assessment findings through corrective action and evidence-supported closure.
- Maintain incident-response plans and support tabletop or functional exercises.
- 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 seven (7) years of cybersecurity.
- Minimum five (5) years in federal ISSO, ConMon, vulnerability, security operations, or compliance work.
- 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 with Splunk searches, dashboards, ingestion verification, log coverage, and incident timeline support.
- Direct experience with ServiceNow incidents, problems, changes, remediation tickets, and reporting.
- Direct experience with Tenable Nessus, Qualys, ACAS, or comparable Government-approved scanners.
- Experience with Defender, Intune, BigFix, or equivalent endpoint and configuration 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.)

## About C3EL

## Company Overview
- **One-liner**: C3EL delivers advanced information technology, engineering, and logistics services with a core focus on Command and Control and Communications systems to the Department of Defense and other federal agencies.
- **Entity Type**: Private (Woman-Owned Small Business – WOSB)
- **Headquarters**: Tampa, Florida, United States
- **Founded**: 2012
- **Founders**: Not publicly listed; leadership includes CEO Laura Hoernig and COO Jack Rhodes

## Core Business
- **Primary Industry**: IT Services and IT Consulting, Defense & National Security
- **Target Customers**: U.S. Department of Defense (DoD), Federal Agencies, and allied partners
- **Mission/Purpose**: “Delivering advanced information technology and engineering services with a core focus on Command and Control, Communications systems to the Department of Defense and other Federal Agencies.”

## Products & Services
- **Enterprise IT Services**: Full lifecycle IT infrastructure design, implementation, and management (networks, servers, data centers).
- **Command Center Solutions**: Turn-key design, integration, and delivery of command centers, including AV and communications systems, SCIFs, and briefing centers.
- **Cloud & Virtualization**: Cloud migration, management, and optimization services.
- **Communications Solutions**: Secure, reliable full lifecycle communications (including SATCOM, tactical communications, and voice/data networks).
- **Cybersecurity**: Security operations, network defense, and compliance support.
- **Logistics & Engineering**: Logistics support, engineering services, and program management for deployed and enterprise environments.

## Market Standing
- **Valuation**: Not publicly disclosed
- **Key Metric**: Estimated annual revenue $5.0M–$25.0M (LinkedIn data); Total employees 34 (LinkedIn, +6.4% monthly growth)
- **Notable Investors/Partners**: Not publicly listed (privately held); customers include U.S. DoD and other federal agencies
- **Growth Signals**: 37 active job postings (Greenhouse), 94.7% quarterly increase in job postings, presence in 40+ countries, LinkedIn followers 2,600 (+1.1% monthly)

## Competitive Advantages
- **Woman-Owned Small Business (WOSB)** status, enabling set-aside contracting opportunities.
- **Top Secret Facility Clearance** and extensive experience with SCIFs and secure environments.
- **Vertical integration**: Senior management deploys directly with teams, ensuring high-quality execution.
- **Global footprint**: Supports operations in 40+ countries, with personnel experienced in both deployed and enterprise environments.

## Strategic Focus
- Continue to expand DoD and federal agency customer base by delivering mission-critical command, control, communications, and IT solutions.
- Invest in cloud, cybersecurity, and modernization services to meet evolving defense needs.
- Grow workforce through a disciplined hiring pipeline (37 open positions across multiple geographies, including Hawaii, Italy, Kuwait, Belgium, and U.S. bases).

## Why Work Here
- **Culture**: Employee reviews rate culture 3.9/5 and career development 4.1/5; compensation rated 4.5/5 (Glassdoor/LinkedIn).
- **Work Environment**: Supportive, mission-focused environment with a focus on professional growth; many roles require security clearance and offer the chance to work on critical national security projects.
- **Remote/Hybrid**: Many roles are on-site at government facilities (e.g., Tampa, Hawaii, overseas bases); some roles may offer flexibility, but clearance requirements often dictate location.
- **Notable Perks**: Opportunity to work directly with DoD customers, deploy with teams, and gain exposure to cutting-edge command and control technologies.

## Sources
1. [c3el.com – About Us](https://c3el.com/about-us/)
2. [c3el.com – Homepage](https://c3el.com/)
3. [c3el.com – Careers](https://c3el.com/careers/)
4. [Greenhouse – Jobs at C3EL](http://job-boards.greenhouse.io/c3el)
5. [LinkedIn – C3EL Company Page](https://www.linkedin.com/company/c3el)

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