Director, Supply Chain Management – Kaleidos

Radiant•El Segundo, CA

About The Position

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 failsafe microreactor that can be transported anywhere power is needed and run for up to five years without the need to refuel. 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 utilizes modern software engineering to rapidly achieve safe, factory-built microreactors that leverage existing, well-qualified materials. Founded in 2020, Radiant is on track to test its first reactor next year at the Idaho National Laboratory, with initial customer deliveries beginning in 2028. The Director will lead a team of Supply Chain Managers and Buyers responsible for critical reactor components and services, driving consistent adherence to processes while continuously improving workflows as the organization scales. This role partners closely with Engineering, Finance, Regulatory, Production, Supplier Development, and Planning leadership to ensure material availability, reliable promise dates, and clean supply chain data that supports confident decision-making in a regulated, fast-moving environment. This is a hands-on leadership role for someone who thrives on operational excellence, accountability, and turning complex supply chains into predictable execution engines.

Requirements

Bachelor’s degree in Supply Chain Management, Business, Engineering, or a related field.
8–12+ years of experience in procurement, supply chain management, or manufacturing operations, including leadership of teams.
Strong operational understanding of sourcing, contracting, PO execution, expediting, and supplier performance management.
Proven ability to run complex procurement operations with tight schedules and high accountability.
Experience working cross-functionally with Engineering, Quality, Manufacturing, and Program teams.
High comfort level using ERP/MRP systems, dashboards, and performance metrics to manage execution.
Excellent leadership, communication, and organizational skills.
Willingness to travel to suppliers as needed (up to ~30%).

Responsibilities

Supply Chain Execution & Leadership Lead and develop a team of Supply Chain Managers and Buyers responsible for direct procurement supporting Kaleidos reactor builds. Establish clear expectations, operating cadence, and accountability across sourcing, PO execution, expediting, and supplier follow-up. Drive a culture of urgency, ownership, and data accuracy across the supply chain organization.
Sourcing & Procurement Operations Oversee sourcing strategies and supplier selection in close collaboration with Supplier Development Engineers (SDEs) and Engineering. Ensure commercial terms, lead times, quality clauses, and flow-down requirements are correctly reflected in contracts and purchase orders. Maintain tight control of the full PO lifecycle—from requisition to delivery, closure, and post-delivery follow-up.
Delivery & Performance Management Own supply chain health metrics including promise date integrity, on-time delivery to need date, PO line health, and supplier responsiveness. Ensure meeting notes, supplier commitments, and follow-ups are documented, tracked, and reflected accurately in systems. Proactively identify at-risk parts and suppliers, mobilizing resources to protect manufacturing and program schedules.
Process Discipline & Continuous Improvement Enforce consistent use of established supply chain processes while identifying and implementing improvements to streamline workflows. Partner with Supply Chain Operations and Technology teams to implement dashboards, reporting, and data pipelines that improve visibility and decision-making. Support integration of supply chain into engineering change processes, ensuring material impact is assessed and dispositioned correctly.
Cross-Functional Execution Serve as a primary escalation point for material, supplier, and delivery issues impacting Kaleidos execution. Ensure procurement and supplier activities remain compliant with internal controls and external regulatory requirements.

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.
Beautiful El Segundo headquarters close to the Pacific Ocean.