Senior DoD ISSE: Security Architect & RMF Expert

Star3; Bloomington, Northern (IN, KY); Hybrid; USD 140,000 - 190,000; Full time

Job summary

TRISTAR seeks an Information System Security Engineer III to provide expert-level cybersecurity engineering, security architecture, and RMF support for DoD networks and systems in Bloomington, Indiana. The role requires IASAE Level III qualification, DoD experience, and strong leadership across lifecycle phases.

You will lead threat modeling, security reviews, and RMF artifacts (SSPs, SAPs, SARs, POA&Ms) and advise government stakeholders on risk reduction and compliance requirements in a

Qualifications

• Bachelor's or Master's degree in a related technical field such as Computer Science, Cybersecurity, Information Security or Systems Engineering.
• DoD 8570/8140 IASAE Level III baseline qualification or equivalent, CASP/CISSP strongly preferred.

Responsibilities

• Serve as a senior SME for cybersecurity engineering and IASAE architecture across DoD systems.
• Integrate cybersecurity requirements throughout system lifecycle from acquisition to sustainment.
• Develop and maintain RMF documentation including SSPs, SAPs, SARs, and POA&Ms.
• Lead security design reviews, threat modeling, vulnerability assessments, and risk assessments.
• Provide technical leadership and advisory support to Government stakeholders and contractor teams.

Skills

Cybersecurity Engineering

RMF & ATO

IASAE Level III

Cloud Security

Zero Trust

Incident Response

Threat Modeling

Education

Bachelor's or Master's in CS/Security

CASP or CISSP

Tools

eMASS

Nessus

SIEM

Job description

TRISTAR seeks an Information System Security Engineer III to provide expert-level cybersecurity engineering, security architecture, and RMF support for DoD networks and systems in Bloomington, Indiana. The role requires IASAE Level III qualification, DoD experience, and strong leadership across lifecycle phases.

You will lead threat modeling, security reviews, and RMF artifacts (SSPs, SAPs, SARs, POA&Ms) and advise government stakeholders on risk reduction and compliance requirements in a