Security Clearance Jobs in California

Company Description Join us and make YOUR mark on the World!Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthe...

Company Description Join us and make YOUR mark on the World!Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthe...

Company Description Join us and make YOUR mark on the World!Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthe...

Company Description Join us and make YOUR mark on the World!Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthe...

Company Description Join us and make YOUR mark on the World!Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthe...

Company Description Join us and make YOUR mark on the World!Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthe...

Company Description Join us and make YOUR mark on the World!Are you interested in joining some of the brightest talent in the world to strengthen the United States' security? Come join Lawrence Liverm...

Company Description Join us and make YOUR mark on the World!Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthe...

Company Description Join us and make YOUR mark on the World!Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthe...

OverviewSystems Administrator LOCATION: Mountain View, CA JOB STATUS: Full-time CLEARANCE: BI investigation TRAVEL: Limited, as needed Must be US citizen or permanent legal resident Astrion/MEIS...

Date Posted:2026-03-12Country:United States of AmericaLocation:US-CA-ONTARIO-R27 ~ 1120 S Vineyard Ave ~ BLDG R27Position Role Type:Onsite U.S. Citizen, U.S. Person, or Immigration Status Requirements...

Date Posted:2026-03-12Country:United States of AmericaLocation:US-CA-EL SEGUNDO-R02 ~ 1970 E Imperial Hwy ~ BLDG R02Position Role Type:Onsite U.S. Citizen, U.S. Person, or Immigration Status Requireme...

MANTECH seeks a motivated, career and customer-oriented Activity Security Representative II to join our team in El Segundo, CA.The Activity Security Representative's primary function is to provide mul...

MANTECH seeks a motivated, career and customer-oriented Physical Industrial Security Specialist to join our team in El Segundo, CA.This position provides physical security (PS), industrial security, a...

The Test Engineer is responsible for leading the test team's efforts for the C2PMod project. They will play a supporting role in achieving the organization's goals by interfacing with program leadersh...

The Test Engineer is responsible for providing support to the Naval Information Warfare Center (NIWC) Pacific by supporting the Command and Control Processor Modernization (C2P Mod) testing effort. Th...

Job Title: Senior Acquisition Program Manager Job Description: Senior FMS Program Manager Required Skills/Education: Advanced Degree (Master of Arts (MA) / Master of Science (MS) and 12 years of exper...

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers' mission and quest fo...

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers' mission and quest fo...

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers' mission and quest fo...