El Segundo, California, United States · On-site
$134k–$190k/yr
About Radiant Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can b…
Skills: Technical program management, IT infrastructure, Security compliance, CMMC, NIST SP 800-171
El Segundo, California, United States · On-site
$163k–$204k/yr
Title: Senior Crypto Security Engineer Belong. Connect. Grow. with KBR! KBR’s National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the intelligence and nati…
Skills: Cryptography, Systems Engineering, Cybersecurity, Key Management, Space Systems
El Segundo, California, United States · On-site
$99k–$133k/yr
Associate Space Communications Systems Engineer Analyst Company: The Boeing Company The Boeing Defense, Space & Security (BDS) team is seeking an Associate Space Communications Systems Engineer Analyst to join the team i…
Skills: RF link analysis, Communications capacity analysis, Waveform analysis, Python, MATLAB
El Segundo, California, United States · On-site
$135k–$170k/yr
Title: Strategic Requirements Systems Engineer Belong. Connect. Grow. With KBR! KBR’s National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the intelligence …
Skills: Systems engineering, Requirements development, DOORS, Satellite systems, DoD programs
El Segundo, California, United States · On-site
$150k–$229k/yr
Title: Spacecraft Subsystem SME Belong. Connect. Grow. with KBR! KBR’s National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the intelligence and national se…
Skills: Systems engineering, Integration and testing, Spacecraft subsystems, Technical leadership, Space qualification testing
El Segundo, California, United States · On-site
$53k–$108k/yr
University - 2027 Summer Games Cyber Security Intern - El Segundo, CA The Opportunity: The Summer Games is an innovative internship program that attracts some of the nation’s best and brightest students. The goal is to d…
Skills: Cybersecurity, Networking concepts, OSI model, Virtualization, Linux
El Segundo, California, United States · On-site
$90k–$128k/yr
Title: ESS Product Support/Acquisition Logistics Specialist Belong. Connect. Grow. with KBR! KBR is seeking a Product Support / Acquisition Logistics Specialist to join our team in El Segundo, CA. The MSEIT effort provid…
Skills: Acquisition logistics, Product support, Systems engineering, Sustainment planning, DoD SATCOM
El Segundo, California, United States · On-site
$76k–$141k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Top Secret TRAVEL: Yes, 10% of the TimeDescription At Northrop Grumman, our employees have incredible opport…
Skills: Industrial security, Personnel security, Physical security, Access control, OPSEC
El Segundo, California, United States · On-site
$99k–$162k/yr
ASIC / FPGA Digital Design Engineer – (Associate or Experienced) Company: Boeing Space, Intelligence & Weapons Systems has an exciting opportunity for multiple ASIC/ FPGA Digital Design Engineers – (Associate or Experien…
Skills: ASIC design, FPGA implementation, HDL development, RTL design, Digital logic design
El Segundo, California, United States · On-site
$177k–$266k/yr
RELOCATION ASSISTANCE: Relocation assistance may be available CLEARANCE REQUIRED FOR START: Yes CLEARANCE TYPE: Secret TRAVEL: Yes, 25% of the TimeDescription At Northrop Grumman, our employees have incredible opportunit…
Skills: Propulsion systems, Fluid management, Siemens AMESIM, MATLAB, Simulink
El Segundo, California, United States · On-site
$113k–$222k/yr
Java Software Engineer (Associate, Experienced or Senior) - Bixby Company: The Boeing Company The Boeing Company is currently seeking a motivated Software Engineer / Developer (Associate, Experienced or Senior) to suppor…
Skills: Java, ReactJS, Spring Boot, WildFly, JPA
El Segundo, California, United States · On-site
$90k–$128k/yr
Title: ESS Product Support/Acquisition Logistics Specialist Belong. Connect. Grow. with KBR! KBR is seeking a Product Support / Acquisition Logistics Specialist to join our team in El Segundo, CA. The MSEIT effort provid…
Skills: Product support, Acquisition logistics, Systems engineering, Sustainment planning, Lifecycle management
El Segundo, California, United States · On-site
Title: Information System Security Manager (ISSM) We are KBR At KBR, we partner with clients to provide purposeful and comprehensive science, technology and engineering solutions to governments as well as the top tier co…
Skills: Information System Security, Risk Management Framework, Assessment & Authorization, Cybersecurity Policy, NIST SP 800-53
El Segundo, California, United States · On-site
$45k–$56k/yr
Title: Administrative Assistant Belong. Connect. Grow. with KBR! KBR’s National Security Solutions team provides high-end engineering and advanced technology solutions to our customers in the intelligence and national se…
Skills: Administrative support, Meeting coordination, Calendar management, Microsoft Office Suite, Visitor control
El Segundo, California, United States · On-site
$233k–$292k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: Data governance, Data engineering, Data management, ETL, Data modeling
El Segundo, California, United States · On-site
$115k–$145k/yr
Overview Stellar Solutions, a nationally recognized “Great Place To Work,” delivers engineering solutions across commercial space and national security missions—from innovative new entrants to established space systems o…
Skills: Cybersecurity engineering, Risk management framework, Mission based cyber risk assessment, Cyber table top, Vulnerability analysis
El Segundo, California, United States · Hybrid
$110k–$145k/yr
Overview Stellar Solutions, a nationally recognized “Great Place To Work,” delivers engineering solutions across commercial space and national security missions—from innovative new entrants to established space systems o…
Skills: Systems engineering, Acquisition logistics, Sustainment planning, System integration, DoD acquisition
El Segundo, California, United States · On-site
$97k–$121k/yr
For more than 50 years, ENSCO has been providing leading-edge engineering, science and advanced technology solutions to governments and private industries worldwide. ENSCO prides itself in creating and applying advanced …
Skills: Configuration Management, Change Control Process, Engineering Review Boards, Configuration Change Control Boards, Technical Baseline Development
El Segundo, California, United States · On-site
$190k–$260k/yr
CHAOS Industries is redefining modern defense with a multi-product portfolio that gives the ultimate advantage—domain dominance. The company's products are powered by Coherent Distributed Networks (CDN™), empowering warf…
Skills: Power Electronics, Analog Board Design, DC/DC Conversion, EMI/EMC Mitigation, PCB Layout
El Segundo, California, United States · On-site
$150k–$180k/yr
Job DetailsLevel: ExperiencedJob Location: SBG - El Segundo - El Segundo, CA 90245Position Type: Full TimeEducation Level: 4 Year DegreeSalary Range: $150,000.00 - $180,000.00 SalaryTravel Percentage: Up to 25%Job Shift:…
Skills: Systems Engineering, Integration and Test, SATCOM, Spacecraft Hardware, Payload Hardware
El Segundo, California, United States • On-site
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The role involves managing the IT and security program portfolio by tracking concurrent projects, ensuring cross-functional alignment, and maintaining integrated schedules. You will also oversee compliance efforts, produce technical documentation, and escalate blockers to leadership to ensure project delivery.
Candidates must have 6+ years of experience in technical program management, specifically within infrastructure and security environments. Proficiency in construction scheduling, compliance frameworks like CMMC/NIST, and hands-on experience with Atlassian tools is required.
Radiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1-megawatt, fail-safe microreactor that can be transported anywhere power is needed and run for up to 5 years without refueling. Portable nuclear power with rapid-deploy capability can replace similar-sized diesel generators and provide critical asset support for hospitals, data centers, remote sites, and military bases. Radiant’s unique, practical approach to nuclear development leverages modern software engineering to rapidly deliver safe, factory-built microreactors that use existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor at the Idaho National Laboratory this summer, with initial customer deliveries beginning in 2028.
Radiant is seeking a talented Technical Program Manager, IT & Security, to own visibility and delivery across our IT and security program portfolio. You will track eight concurrent programs spanning three states: a reactor program at Idaho National Laboratory; a fuel facility and manufacturing plant in Tennessee; warehouse and office buildouts in Los Angeles; a site decommissioning; and a CMMC and NIST SP 800-171 compliance program running across all of it.
We have strong technical leaders on each effort. What we don't have is one person who can see the whole portfolio at once, keep it visible, and ensure teams meet commitments. In this role, you won't write the SSP or design the network. You'll make sure the people doing that work are aligned, unblocked, and delivering against a schedule everyone can see. You'll represent IT leadership in meetings we can't attend, and you'll be the reason nothing quietly slips.
Build the system of record for how IT and security programs are tracked at Radiant, standing up the tooling, cadence, and reporting that today lives across spreadsheets, inboxes, and people's heads.
Own the operating cadence, including recurring status meetings within IT and security and cross-functional reviews with facilities, construction, engineering, and external partners; set agendas, drive to decisions, capture actions, and follow up.
Maintain integrated schedules, dependencies, risks, and milestones across concurrent programs; know what's on track, what's at risk, and what needs escalation before anyone asks.
Keep IT scope sequenced with construction, partnering with the facilities project manager to ensure structured cabling, MDF/IDF, low-voltage, access control, cameras, wireless, and carrier circuits are planned into general contractor milestones rather than retrofitted after drywall.
Support the CMMC and NIST SP 800-171 compliance program alongside executives, tracking milestone plans, POA&M status, remediation coordination, evidence collection, and assessor coordination while technical control decisions remain with the security team.
Produce technical and network diagrams, architecture documentation, project charters, status reporting, and executive summaries.
Escalate slipping commitments and unresolved blockers to the VP of IT and VP of Cybersecurity early enough to act on them.
6+ years in technical program or project management, including infrastructure and security programs.
Experience delivering IT infrastructure into new construction or facility buildouts, manufacturing, industrial, healthcare, or multi-site commercial.
Ability to read a construction schedule, work with a facilities PM and general contractor, and know when the window for IT work opens and closes.
Hands-on experience administering and structuring work in Atlassian tooling, building Jira projects, workflows, dashboards, and Confluence spaces that teams actually adopted.
Ability to hold your own in an architecture review: read and produce network diagrams, understand infrastructure and security concepts, and ask the right questions of engineers without needing translation.
Experience in a regulated environment, nuclear, defense, aerospace, life sciences, or similar, including work under compliance frameworks.
Track record of driving accountability without direct authority, through influence, clear artifacts, and disciplined follow-through.
Strong written communication, documentation that engineers respect and executives can act on.
Familiarity with CMMC, NIST SP 800-171, or FedRAMP.
Experience in DOE, a national laboratory, or ITAR-controlled environments.
Exposure to OT and IT convergence in manufacturing or plant settings.
Site decommissioning or IT asset disposition experience.
PMP or equivalent formal project management training.
Must be willing to work extended hours and weekends as necessary to accomplish our mission.
Must work 100% onsite at Radiant's El Segundo HQ.
Travel up to 15%, heavier during site activation windows.
Stock: Substantial incentive stock plan for all full-time employees.
Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
One Medical: Sponsored memberships for employees and their dependents.
Vision: 100% top tier plan coverage + 50% for dependents.
Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.
Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.
8-weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.
Daily catered lunch. Free snacks and drinks.
Flexible PTO policy. Remote workday allocation.
Company and team-bonding events, happy hours and in-person camaraderie.
Beautiful El Segundo headquarters close to the Pacific Ocean.
Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: [email protected].
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.
This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.
Making Nuclear Power Portable.
Radiant is building the world’s first mass-produced portable nuclear microreactors. The company’s first reactor, Kaleidos, is a 1 MW failsafe microreactor that can be transported anywhere power is needed. Founded in 2020, Radiant plans to test its first reactor in 2026, with initial customer deployments beginning in 2028.
Offices: 1921 E Maple Ave, El Segundo, California 90245, US
Based on 730 listings with disclosed salaries, most security & safety jobs in El Segundo, CA pay between $92k–$225k per year. Individual offers vary with seniority, company size, and specialization.
There are currently 806 open security & safety positions in El Segundo, CA listed on Clera. New openings are added daily as companies post roles.
Companies currently hiring include Boeing, The Aerospace Corporation, RTX, CHAOS Industries, KBR, Inc., among others. Browse the listings above to see every active employer.
Yes — 80 of the 806 open security & safety positions offer remote or hybrid work (8 remote, 72 hybrid).
Each listing links directly to the employer's application page. Apply early — fresh listings get the most recruiter attention in the first two weeks.
