Senior Material Planner

Radiant Industries•El Segundo, CA

2d•$115,000 - $168,000•Onsite

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, 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. Radiant’s 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. 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.

Requirements

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.

Nice To Haves

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

Responsibilities

Partner with Engineering to translate reactor design into a company-wide planning bill of materials.
Work with the Mission Planning team to configure and launch Materials Resource Planning within our new ERP system.
Own and maintain part attributes — lead times, order quantities, safety stock levels — to ensure accurate, actionable material plans.
Coordinate with Production to keep make/buy decisions in MRP current with the production plan.
Produce weekly Clear to Build reports identifying company-wide material shortages for Production.
Produce weekly Design Release Needs reports, flagging designs required to meet procurement lead times.

Benefits

Substantial incentive stock plan for all full-time employees.
100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.
Sponsored memberships for employees and their dependents.
100% top tier plan coverage + 50% for dependents.
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.