Radiant jobs

Radiant seeks an Engineering Manager, Electrical Systems to lead the electrical engineering team building test infrastructure and system integration for Kaleidos, a 1-megawatt portable nuclear microreactor. The role requires 8+ years of electrical engineering hands-on experience, 2+ years of engineering management, and expertise in DAQ systems, LabVIEW, and hardware validation. Onsite in El Segundo, CA; salary $208.5–284K.

Business Development Associate at Radiant (nuclear microreactors startup) focuses on federal government sales strategy and stakeholder engagement. Role involves research, relationship building, proposal drafting, and coordination of government briefings for nuclear reactor products. Onsite in Washington; salary USD $85.5K–$122.3K annually. This is a BD/sales operations role in an emerging hardware/defense sector with onsite location requirement.

Cost Accounting Manager at Radiant (portable nuclear microreactor startup), based in El Segundo, CA (onsite). Leads cost accounting functions including manufacturing costing, month-end close, inventory management, cost variance analysis, and ERP optimization. Reports to Director of Accounting; collaborates with Operations and Supply Chain. Requires 7+ years cost accounting experience in manufacturing/R&D. This is an accounting and manufacturing operations role, not a strategy or sales function.

This Senior Equipment Engineer role at Radiant involves designing and building custom production equipment for manufacturing and assembling nuclear microreactors. Responsibilities span equipment design, supplier identification, fabrication oversight, and process innovation. Requires 4+ years of mechanical design/CAD experience and GD&T expertise. Based in El Segundo, CA.

This Director of Investor Relations role at Radiant involves building and leading the investor relations function from the ground up. Responsibilities span investor strategy development, capital markets execution, financing support, and ongoing investor relationship management. The role sits at the intersection of finance, strategy, and communications, requiring deep knowledge of investor thesis fit and capital market dynamics. Based in El Segundo, CA.

This Junior Video Editor & Content Coordinator position at Radiant involves video editing in Premiere Pro, graphic design, archival research, and social media content creation. Responsibilities include assembling branded video content, creating infographics, and writing social copy. This is an entry-level contract role in the operations/creative space. Based in El Segundo, CA.

Radiant is hiring a Senior Mechanical Engineer, Mechanisms to design and develop critical mechanisms within the Kaleidos microreactor, including control blade actuators and safety features. Requires bachelor's in mechanical or aeronautical engineering, 4+ years designing mechanisms, and 4+ years in stress analysis using FEA tools. Responsible for trade studies, analysis, manufacturing/assembly, BOM, supplier development, and risk analysis. El Segundo, CA onsite; $133.5k–$184.8k annually plus equity and benefits.

Radiant is hiring a Principal Electrical Engineer, Integration & Test to lead electrical system architecture and test infrastructure for the Kaleidos microreactor. Requires BS in Electrical Engineering, 10+ years of progressive hands-on experience in design/integration/test, and demonstrated technical leadership. Responsible for electrical validation strategy, test procedures, and cross-functional communication. El Segundo, CA onsite; $200.5k–$314.5k annually plus equity and benefits.