Mission-Focused ISSO: DoD RMF & eMASS Expert

CACI International Inc.; O'Fallon (IL); On-site; USD 75,000 - 158,000; Full time

Job summary

CACI International Inc. is seeking an Information Systems Security Officer (ISSO) to own the daily security posture for DoD information systems. You will partner with engineering, operations, and architecture teams to maintain secure system performance and develop RMF artifacts.

You will advance into a senior GRC career path, with opportunities for growth and a focus on continuous monitoring and formal authorization. Travel to Scott Air Force Base is quarterly.

Qualifications

• Active Secret or TS clearance required.
• 3–5 years RMF/ATO experience in DoD or federal environments.
• Hands-on experience with eMASS.
• Working knowledge of NIST SP 800‑53 Rev. 5 and DoD RMF processes.
• Demonstrated ability to author SSPs and manage POA&Ms.
• DoD 8140M CEH certification or equivalent.
• Ability to travel to Scott Airforce base quarterly.

Responsibilities

• Develop, update, and maintain System Security Plans (SSPs) for assigned systems.
• Manage POA&Ms from identification through remediation and closure.
• Compile and submit complete Authorization to Operate (ATO) packages.
• Conduct continuous monitoring aligned with RMF standards using RMF tools.
• Coordinate with ISSEs and SecOps to validate security control implementations.
• Draft SAPs and support SAR development and coordination.
• Create supply chain risk management plans to support system-level authorization.
• Collaborate with Cybersecurity Architect on RMF strategic planning.

Skills

RMF/ATO

eMASS

NIST SP 800-53 Rev.5

SSP writing

POA&Ms

DoD RMF

Education

CEH

DCWF Basic Tier

DoD 8140 Education Options

Job description

CACI International Inc. is seeking an Information Systems Security Officer (ISSO) to own the daily security posture for DoD information systems. You will partner with engineering, operations, and architecture teams to maintain secure system performance and develop RMF artifacts.

You will advance into a senior GRC career path, with opportunities for growth and a focus on continuous monitoring and formal authorization. Travel to Scott Air Force Base is quarterly.