Senior DoD Cyber Systems Security Engineer (TS Preferred)

Ennoble First Inc.; Arvada (CO); On-site; USD 125,000 - 190,000; Full time

Job summary

Ennoble First is seeking a Cyber Systems Security Engineer to support the COOLR program for key government clients, including Lockheed Martin and the U.S. Air Force. This role requires 100% on-site work and a strong RMF/security engineering background.

You will coordinate with ISSM/ISSO teams, prepare RMF artifacts, and ensure compliance across DoD policies while supporting continuous monitoring and security authorizations for classified information systems.

Qualifications

• Bachelor's degree in a related technical discipline.
• Active final DoD Secret clearance; active Top Secret preferred.

Responsibilities

• Ensure information systems meet RMF standards through direct coordination with ISSM and ISSO.
• Prepare, maintain, and submit RMF artifacts in support of prime contractor requirements and ISSM delivery schedules.
• Create and update system artifacts, including hardware and software baselines, PPSM records, and network diagrams.
• Apply STIGs, perform trusted downloads, and maintain RMF-based compliance under applicable DoD/DoW, DCSA DAAG, and classified Lockheed Martin policies.
• Support continuous monitoring using Qmulos, Splunk, DISA ACAS or Nessus, and Trellix Endpoint Security.
• Generate, update, and provide security authorization engineering artifacts for ongoing projects.
• Coordinate with Lockheed Martin cybersecurity engineers, mission systems engineers, and ISSM/ISSO teams to prioritize findings and recommend remediation.
• Support change management and maintain current asset inventories.
• Lead technical best-practice discussions, mentor peers, and coordinate with functional teams to resolve issues.
• Participate in Agile/Jira planning to establish cyber engineering scope, schedule, and completion.

Skills

Active clearance

Security+ certification

On-site work

9x80A schedule

Education

Bachelor's degree in a related technical discipline

Tools

RMF

ISSM

ISSO

STIGs

Qmulos

Splunk

DISA ACAS

Nessus

Trellix Endpoint Security

Agile/Jira

Job description

Ennoble First is seeking a Cyber Systems Security Engineer to support the COOLR program for key government clients, including Lockheed Martin and the U.S. Air Force. This role requires 100% on-site work and a strong RMF/security engineering background.

You will coordinate with ISSM/ISSO teams, prepare RMF artifacts, and ensure compliance across DoD policies while supporting continuous monitoring and security authorizations for classified information systems.