About Radiant

Radiant is an El Segundo CA-based startup building the worlds first mass-produced portable nuclear microreactors. The companys 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. Radiants 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.

About the Role
Radiant is seeking a Director Cybersecurity to implement the controls and protection necessary for safeguarding our sensitive information and technology. You will be responsible for cybersecurity partnering with our engineering and IT departments to implement security controls as well as developing and managing information protection programs. You will drive innovation across the nuclear industry by advocating for controls and access solutions that have not been previously deployed. A successful candidate will leveragetheir experience on DoD and IC programs and bring those same designs to the nuclear space. Creativity and a passion for challenging the status quo are a must.

Responsibilities & Duties:

• Lead the development and implementation of comprehensive security strategies and policies.

• Manage budget and resources for security infrastructure.

• Lead cybersecurity audits assessments and control testing.

• Review regulatory requirements and provide solutions and rationale that meet the intent of those requirements with modern tools.

• Review operational requirements and system specification documents to ensure applicable security requirements are addressed and incorporated into security processes.

• Educate stakeholders on modern and efficient means for protecting material and information.

• Serve as our liaison with regulators auditors and government stakeholders.

Required Qualifications & Skills:

• 7 years of experience in cybersecurity preferably in a defense or high-assurance environment.

• Strong understanding of application security and performing assessments utilizing a risk management framework.

• Proven track record of developing and implementing security policies and procedures.

• Knowledge of relevant federal and state regulations affecting nuclear and defense industry security.

• Bachelors degree in Computer Science Engineering or a related field.

Desired Qualifications & Skills:

• Direct experience with nuclear security regulations (NRC 10 CFR 73).

• Experience interfacing with executive leadership and external regulators.

• Familiarity with ICS/OT cybersecurity in energy or defense environments.

• Prior work with COMSEC insider threat programs or physical-cyber integration.

• Professional certifications (e.g. CPP PSP PCI from ASIS International).

• Previous experience working with defense contracts and understanding of relevant export control regulations (Part 810 Pat 110 EAR ITAR).

Additional Requirements:

• Must be willing to work extended hours and weekends as necessary to accomplish our mission.

• Must work 100% onsite at El Segundo HQ.
  

Benefits and Perks

• 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. Radiants 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 todays advanced reactor builders dont wait for job postings. They join the winning team. If thats you contact us directly for immediate opportunities: .

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.

Unfortunately we are unable to provide visa sponsorship at this time.

This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicants capacity to serve in compliance with U.S. export controls.

Required Experience:

Director