About Radiant

Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. The U.S. grid is under growing strain, with power demand accelerating, driving higher utility costs, rising carbon emissions, and interconnection backlogs. Radiant has a solution, transportable, on-site power. Our first reactor, Kaleidos, is 1 megawatt: small enough to be factory-built, transported by land, sea, or air, and deployed wherever power is needed. 1 MW can power 1000 homes for five years. Ship it back and we refuel for a 20 year operating life. We made energy a product that can be used for critical infrastructure like military bases, data centers, hospitals, and remote sites, as well as the commercial main street businesses that keep America running. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force and has signed pre-order agreements with Equinix, with deployments beginning in 2028.

About the Role

Radiant is seeking a proactive Senior Material Planner to own material planning across the full lifecycle of our micro nuclear reactors. This role partners with Engineering to translate reactor designs into a company-wide planning bill of materials and works alongside the Mission Planning team to stand up Materials Resource Planning (MRP) within our new Enterprise Resource Planning (ERP) system. You will manage key part attributes — lead times, order quantities, and safety stock — to keep material plans accurate across the build. You will coordinate closely with Production to ensure make/buy decisions in MRP reflect the current build sequence. As Radiant's first Material Planner, you will build this function from the ground up and set the standard for how material planning operates at the company.

Responsibilities & Duties

Planning Bill of Materials: Partner with Engineering to translate reactor design into a company-wide planning bill of materials.

MRP Standup: Work with the Mission Planning team to configure and launch Materials Resource Planning within our new ERP system.

Part Attribute Management: Own and maintain part attributes — lead times, order quantities, safety stock levels — to ensure accurate, actionable material plans.

Make/Buy Alignment: Coordinate with Production to keep make/buy decisions in MRP current with the production plan.

Shortage Reporting: Produce weekly Clear to Build reports identifying company-wide material shortages for Production.

Design Release Reporting: Produce weekly Design Release Needs reports, flagging designs required to meet procurement lead times.

Deliverables

Company-wide planning bill of materials

Populated Materials Resource Plan

Maintained part attributes across the product line

Weekly Clear to Build reports showing production shortages

Weekly Design Release Needs reports based on procurement lead times

Required Qualifications & Skills

3 – 10 years of relevant experience in material planning, supply chain management, or operations, preferably within manufacturing or technology sectors.

ERP/MRP system experience

Strong analytical and organizational skills with an ability to manage complex, evolving bills of materials.

Excellent cross-functional communication skills — this role sits at the intersection of Engineering, Mission Planning, and Production.

Comfort operating with ambiguity and building processes from scratch.

Desired Qualifications & Skills

Experience working in a start-up, or other rapidly evolving industry is preferred

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.