Lead Systems Engineer

Last Energy is a pioneering US technology company focused on fleet-wide deployment and operation of next-generation nuclear assets. We are revolutionizing nuclear power delivery for rapid deployment and scalability.

We are seeking a Lead Systems Engineer at our office in Austin, TX. This person owns the system architecture, requirements, and verification trail for our PWR-5 pilot reactor at the Texas A&M RELLIS campus, part of the U.S. Department of Energy Reactor Pilot Program. The work covers three areas: architecting how the system fits together, owning and decomposing its requirements, and proving through verification and validation that the design works. This is a hands-on role. You author the documents yourself and pull in subject matter experts where you need depth.

The next phase of product development takes the pilot reactor to full operating pressure and temperature. This role joins at the start of this new era and stays with it through build. Most of the work happens in Austin, and travel to RELLIS increases to once or twice a week late as things progress.

The Lead Systems Engineer works across the engineering organization, with no direct reports. This role shapes how Last Energy does systems engineering. It turns the PWR-5 into a documented, traceable system and builds the process every future unit will follow. This person sets technical direction, defines interfaces, and brings clear recommendations to engineering leadership, who make the final call on major design decisions.