Senior Manager, Technical Program Management

Senior Manager, Technical Program Management 

Radiant is seeking a Senior Manager, Technical Program Management to lead the strategic execution of complex engineering programs critical to delivering the world’s first portable nuclear microreactor. This high-visibility role will oversee cross-functional program planning, alignment, and execution across Radiant’s engineering, operations, and leadership teams. 

You will drive the delivery of integrated, multi-disciplinary technical initiatives — aligning timelines, resources, and milestones in service of our mission to deploy a new commercial reactor design for fueled operation by 2026. This role requires an exceptional aptitude for proactively spotting roadblocks and pre-emptively aligning resources to remove those blocks, thereby bringing clarity, structure, and momentum to complex, high-stakes efforts. 

Responsibilities and Duties: 

• Drive company-wide technical programs and own the technical outcomes. You will be responsible for everything from planning through execution, ensuring delivery of key milestones across design, prototyping, testing, and deployment. 
• Partner with executive leadership to set priorities, develop integrated roadmaps, and drive investment decisions. 
• Foster new links between teams by leading cross-functional collaboration with engineering, operations, safety, regulatory, and commercial teams to ensure synchronization of goals and resources. 
• Establish and manage program-level risk frameworks, identifying critical dependencies, bottlenecks, and failure modes early — and working with teams to mitigate them decisively. 
• Communicate program status, challenges, and strategy updates clearly to executive stakeholders and external partners, all while holding each and every stakeholder accountable within defined frameworks. 

Required Qualifications: 

• 8+ years of experience in technical program management, with increasing levels of leadership responsibility. 
• Proven track record managing large-scale, interdisciplinary engineering programs — ideally involving both hardware and software – on time, and on budget. 
• Strong familiarity with engineering development lifecycles in high-regulation, high-risk domains (e.g., aerospace, energy, defense, or automotive). 
• Demonstrated success in aligning executive and technical stakeholders around complex initiatives with tight timelines. 
• Experience in creating and managing budgets, schedules, and resource plans across multiple teams or departments. 
• Exceptional communication, influence, and leadership skills; able to drive accountability and foster alignment in a fast-paced startup environment. 

Desired Qualifications: 

• Engineering background or technical literacy in nuclear, aerospace, or hardware-intensive systems (ideally as an RE/Responsible Engineer). 
• Prior experience in productizing first-of-a-kind (FOAK) technologies or regulated industrial systems. 
• Deep commitment to mission-driven work and a passion for accelerating clean energy solutions. 

Key Traits: 

• Grit: Unflappable perseverance in the face of strong, sustained project headwinds. An unstoppable momentum advancing ever closer to the end-goal.  
• Win Others Over: Persuade, influence, and convert your counterparts into new ways of thinking by steadily building rapport over time.  
• Paranoia: Having a persistent, nagging feeling that all may not be as it seems. Constantly expect the unexpected, and prepare for all possible outcomes.  
• Independently Drive Results: Harness your willpower to push projects through to fruition with minimal hand-holding, and a passion for owning the final outcome.  

Additional Qualifications: 

• Must be willing to work extended hours and weekends as necessary to accomplish our mission. 
• Must work 100% onsite at El Segundo HQ.