Radiant · 13 hours ago
Cybersecurity Manager
El Segundo, California, United States
Full-time
Onsite
Senior Level
7+ years expRadiant is an El Segundo, CA-based startup building the world’s first mass-produced, portable nuclear microreactors. The Cybersecurity Manager will be responsible for implementing security controls and managing information protection programs while partnering with engineering and IT departments.
Clean EnergyEnergyEnergy EfficiencyRenewable Energy
No H1B
U.S. Citizen Only
Responsibilities
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
Qualification
Required
7+ years of experience in cybersecurity, preferably in a defense or high-assurance environment
Strong understanding of network 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
Bachelor's degree in Computer Science, Engineering, or a related field
Preferred
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 ITAR and EAR regulations
Benefits
Stock: Substantial incentive stock plan for all full-time employees.
Medical: 100% premium coverage for base Silver level plan for employee + 50% premium coverage for dependents. Platinum plans available.
One Medical: Sponsored memberships for eligible employees and their dependents.
Vision: 100% premium coverage for top tier plan + 50% for dependents.
Dental: 100% premium coverage for top tier plan (including orthodontia) + 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.
Company
Radiant
Radiant develops portable nuclear microreactors designed to generate electricity and heat in a compact, factory-built form.
51-200 employees
Funding
Current Stage
Late StageTotal Funding
$518.82MKey Investors
Andreessen HorowitzUnion Square Ventures
2025-12-17Series D· $300M
2024-11-14Series C· $165M
2023-04-18Series B· $40M
Leadership Team
Doug Bernauer
Chief Executive Officer
Recent News
2026-01-07
The Motley Fool
2026-01-04
Globe and Mail
2026-01-03
Company data provided by crunchbase