Senior ISSE: RMF & DoD Cyber Security Engineer

Phoenix Operations Group; Columbia (MD); Hybrid; USD 115,000 - 165,000; Full time

Benefits offered by this job

Medical, dental, and vision insurance

Paid time off

Birthday leave

Referral bonuses

Open-source bonuses

Professional development

Job summary

Phoenix Operations Group is seeking an Information Systems Security Engineer (ISSE) to secure complex networks, distributed architectures, and cloud systems supporting big data across enclaves with differing classifications. The role follows a hybrid schedule with 1–2 onsite days weekly and requires an Active Secret clearance and U.S.

citizenship. The ISSE will develop and review authorization documents, perform RMF activities, apply NIST controls, and coordinate remediation across teams.

Qualifications

• 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.

Responsibilities

• 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.

Skills

RMF

DoD accreditation

eMASS/Xacta

TCP/IP

Strong communication

Hybrid work

Education

Bachelor’s degree

Master’s degree

High school diploma

Tools

eMASS

Xacta

Bash

Kubernetes

RHEL

AWS

Visio/draw.io

Job description

Phoenix Operations Group is seeking an Information Systems Security Engineer (ISSE) to secure complex networks, distributed architectures, and cloud systems supporting big data across enclaves with differing classifications. The role follows a hybrid schedule with 1–2 onsite days weekly and requires an Active Secret clearance and U.S.

citizenship. The ISSE will develop and review authorization documents, perform RMF activities, apply NIST controls, and coordinate remediation across teams.