Radiant
Senior System Administrator
$134K–$190K
El Segundo, CA · On-site · Senior · Full-time · Posted Sep 12, 2026
- Experience
- 7+ years administering and engineering production systems.
- Education
- Bachelor's degree in Information Technology, Computer Engineering, Cybersecurity, or a similar field; 4 years of work experience in lieu of a degree.
- Visa sponsorship
- Any job offer is contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
About the job
Own and administer Radiant’s Microsoft 365 GCC High, identity, endpoint, security, SaaS, and AWS systems while building IAM automation and implementing CMMC controls.
What you'll do
- Administer Microsoft 365 GCC High, Entra, Intune, email security, Purview, and business SaaS platforms.
- Build IAM lifecycle and access automation, including provisioning and access reviews.
- Manage AWS workloads and licensing, deliver and document platform projects, and implement and evidence technical controls for CMMC.
What they ask for
- Bachelor's degree in Information Technology, Computer Engineering, Cybersecurity, or a similar field; 4 years of work experience in lieu of a degree.
- 7+ years administering and engineering production systems.
- Hands-on experience across GCC High administration, Entra, IAM automation, Intune without Group Policy, email security and Purview, and SaaS/AWS administration.
- Networking fundamentals, including VLANs, routing, firewall policy, DNS/DHCP, VPN, and wireless.
Nice to have
- Purview depth; CMMC or NIST 800-171 exposure; or identity governance tooling experience.
- Automation with PowerShell, Python, Microsoft Graph, and infrastructure as code; maintained PowerShell modules; or regulated SaaS deployment experience.
Pay
$133,500 – $190,050 USD base salary
Tools
Microsoft 365 GCC High, Exchange Online, SharePoint, Teams, Entra, Intune, AWS, Purview
Model-written summary · the original posting is authoritative