Senior Manager, Power Systems Nuclear Microreactor
Listed on 2026-11-04
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Engineering
Electrical Engineering, Systems Engineer
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.
the Role
Radiant is seeking a talented Senior Manager, Power Systems, to build and lead the team that designs, models, and validates electrical power systems for our nuclear microreactor platform. You will manage a team of power systems and power electronics engineers, set technical direction and priorities, and ensure the team delivers safe, stable, and reliable power across grid-connected, islanded, rapidly deployable, and space-based environments.
In this role, you will guide your team through power system studies from early architecture tradeoffs through detailed modeling, testing, and system validation, while also driving the development of in-house power electronics, including converters, inverters, and generator controls, needed to support both terrestrial and space-based reactor platforms. This role is central to commercializing Earth's first mass-produced portable nuclear reactors, and to extending that capability beyond Earth.
Responsibilities& Duties
Build, manage, and grow a team of power systems and power electronics engineers, including hiring, mentoring, and performance management.
Set team priorities and roadmaps in partnership with leadership from power conversion, controls, nuclear, and software.
Communicate progress, risks, and results to executive leadership and cross-functional stakeholders.
Lead the team that owns power system architecture, single-line diagrams, and synchronization strategy for single and multi-reactor configurations, grid-connected and islanded.
Direct FMEAs and disturbance analysis (load steps, faults, breaker operations, loss-of-generation) to validate system stability and protection behavior.
Own architecture, sizing, and integration of off-the-shelf hardware for energy storage and power conversion.
Lead in-house power electronics development (converters, inverters, generator controls) to support earth and space-based reactor platforms.
Oversee SIL/HIL and system-level testing, commissioning, and regulatory/power-quality compliance.
B.S. in Electrical Engineering with an emphasis in power systems or control systems.
8+ years of experience designing power systems for generation, microgrids, or mission-critical power systems.
3+ years of experience in a formal people management role.
Experience with sizing and integrating high-voltage battery systems with power electronics.
Track record developing power electronics for high-power, medium-voltage equipment, including transformers, switch gear, inverters, active rectifiers, DC/DC converters, and generator controls.
Background in leading teams with power system modeling and simulation tools (e.g., PSCAD, ETAP, PSS®E, Simulink, or equivalent).
Solid understanding of power system control modes (grid-forming, grid-following, droop control).
Experience in analyzing system stability, protection behavior, and fault response in complex electrical systems.
Proven ability to lead and develop engineering teams while remaining technically hands-on.
Ability to clearly communicate technical concepts and results to cross-functional teams and leadership.
M.S. in Electrical Engineering or related discipline.
5+ years of experience in a formal people management role.
Experience with islanded power systems supporting critical loads.
Familiarity with interconnection requirements, grid codes, and relevant IEEE or utility standards.
Experience in modeling dynamic loads and fast-changing electrical demand.
Exposure to nuclear, aerospace,…
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