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Information System Security Officer (ISSO)
Robert Half Technology
📍
Costa Mesa, United States
Location
Costa Mesa
Posted
April 30, 2026
Commute
Local Area
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Job Description
Description
We are seeking a cleared Information System Security Officer (ISSO) to support classified systems operating within the DoD Risk Management Framework (RMF) and JSIG environments. This role is highly documentation‑focused and centered on ATO support, continuous monitoring, audit readiness, and compliance across multiple classified networks. The ISSO will primarily support the ISSM and may assume ownership of smaller ATO efforts based on workload and system scope. This role will be a 3–6-month contract to hire opportunity!
Key Responsibilities
+ Serve as the ISSO for multiple classified systems, supporting RMF lifecycle activities under ISSM direction
+ Create, update, and submit security authorization artifacts for:
+ New hardware and software extensions
+ RMF updates and control changes
+ Support and maintain ATO packages, including initial authorizations, renewals, and extensions
+ Monitor and assess 3...
We are seeking a cleared Information System Security Officer (ISSO) to support classified systems operating within the DoD Risk Management Framework (RMF) and JSIG environments. This role is highly documentation‑focused and centered on ATO support, continuous monitoring, audit readiness, and compliance across multiple classified networks. The ISSO will primarily support the ISSM and may assume ownership of smaller ATO efforts based on workload and system scope. This role will be a 3–6-month contract to hire opportunity!
Key Responsibilities
+ Serve as the ISSO for multiple classified systems, supporting RMF lifecycle activities under ISSM direction
+ Create, update, and submit security authorization artifacts for:
+ New hardware and software extensions
+ RMF updates and control changes
+ Support and maintain ATO packages, including initial authorizations, renewals, and extensions
+ Monitor and assess 3...