Senior Systems Administrator, TS/SCI — Onsite San Jose

Applied Signal Technology (AST) seeks a Principal Systems Administrator for our onsite team in San Jose, CA. The role requires managing Windows and Red Hat environments, plus cybersecurity collaboration and 24x7 operations.

You will work in a fast-paced setting with a strong emphasis on system hardening, VMware/SCCM experience, and a path toward certifications (Security+ CE). U.S. citizenship and TS/SCI clearance are required.