Senior Mission Planner, Supply Chain

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 an experienced Senior Master Scheduler to own risk assessment and master scheduling across the company. This is a key operations role. You will manage master project schedules that guide Radiant’s commitment and constraint management, and you will build and maintain long-term schedules grounded in sales forecasts and current capacity. You will interface with every level of leadership and act as the central link between Sales, Engineering, Procurement, Production, and Facilities. You will assess schedule risk across individual programs in the context of the full program, then make sure leadership sees it clearly and early.

Responsibilities & Duties

Operational Planning and Master Planning

• Executive Communication: Present schedule status, risks, and tradeoffs to VPs and the C-suite.

• Root Cause Analysis: Investigate and understand the root cause of schedule impacts. Assess risk across individual programs in light of the full program.

• Program & Product Management: Assess schedule health in light of the full program and product lifecycle. Guide the schedule differently depending on the phase of the program and product.

• New Product Integration: Work with ambiguous product and program definitions and coordinate across Engineering, Supply Chain, Manufacturing, and Sales. Bring an organized approach to complex data.

• Schedule Creation & Management: Create and analyze schedules in Microsoft Project and Smartsheet. Combine schedules to assess critical path, dependencies, slack, and capacity. Drive detailed schedules for key activities.

Deliverables

• Company-wide master schedule tied to sales forecasts and current capacity

• Integrated schedules showing critical path, dependencies, slack, and capacity

• Detailed schedules for key activities

• Schedule risk assessments and root cause analyses for schedule impacts

• Executive-level schedule updates for VP and C-suite audiences

Required Qualifications & Skills: (not in your content, so these are placeholders to confirm)

• [5-20] years of relevant experience in master scheduling, program planning, or operations, preferably within manufacturing or technology sectors

• Proficiency in Microsoft Project and Smartsheet

• Strong analytical and organizational skills, with the ability to manage complex, interdependent schedules

• Excellent cross-functional and executive communication skills

• Comfort operating with ambiguity and building processes from scratch

Desired Qualifications & Skills:

• Experience in a start-up or other rapidly evolving industry

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.

• 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.

• 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.

Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiant’s new hire compensation package includes base salary, substantial equity grants, and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance, experience, education, and qualifications, and are designed to support continued growth as scope, responsibility, and impact expand at Radiant.
The best of today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: [email protected].
We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, pregnancy, age, national origin, disability status, genetic information, protected veteran status, or any other characteristic protected by law.

This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls.