> Markdown version of [/jobs/ext/4115578-information-systems-security-engineer-isse-active-clearance-required](https://www.wearedevelopers.com/jobs/ext/4115578-information-systems-security-engineer-isse-active-clearance-required). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md).

---

# Information Systems Security Engineer (ISSE) Active Clearance Required

- **Company:** THE PHOENIX
- **Location:** Columbia, MD, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Xacta, Amazon Web Services, Bash Shell, Big Data, Complex Networks, Cyber Security, Distributed Systems, Microsoft Visio, Network Architecture, Open Source Technology, Commercial Software, Red Hat Enterprise Linux, TCP/IP, Cloud Platform System, Kubernetes
- **Published:** October 4, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=58740593e0be9dc2

## About the Role

* Related bachelor's degree and 9+ years of relevant experience; master's and 7+ years; or high school diploma/equivalent and 13+ years.
 * DoD accreditation experience; RMF preferred.
 * Knowledge of TCP/IP, network architectures, control inheritance, and compliance.
 * Applicable DoD 8140/IAT Level II certification.
 * Experience with eMASS, Xacta, or equivalent authorization systems.
 * Strong communication, collaboration, and independent problem-solving skills.
 * Flexibility to accommodate hybrid schedule changes., CISSP-ISSEP; experience with Bash, Kubernetes, RHEL, AWS, and Visio or draw.io.

Clearance and Schedule

U.S. citizenship and ability to obtain/maintain government clearance are required. Active clearance is preferred, not required initially. Onsite schedules require flexibility.

## Description

Phoenix Ops Group seeks an ISSE to secure complex networks, distributed architectures, and cloud systems supporting big data applications across enclaves with differing classification requirements., * Develop and review authorization documentation supporting federal and DoD requirements.

 * Execute Risk Management Framework (RMF) activities, security assessments, and risk mitigation.
 * Apply DISA STIGs/SRGs and NIST SP 800-53 controls.
 * Evaluate open-source, government, and commercial software risks.
 * Analyze vulnerability scans and coordinate remediation.
 * Maintain authorization artifacts and Plans of Action and Milestones (POA&Ms).
 * Guide engineering teams on secure designs and trusted external connections.