Senior Nuclear Engineer

Last Energy is a nuclear energy company that designs, builds, owns, and operates small modular reactors (SMRs) for industrial and commercial customers. The company's flagship product, the PWR-20, is a 20 MWe pressurized water reactor that is fully modular and factory-produced, enabling faster and more cost-effective deployment than traditional nuclear power plants. Last Energy serves as a behind-the-meter independent power producer, supplying reliable baseload electricity to energy-intensive industries including data centers, metals production, food and beverage, pulp and paper, chemicals, and cement manufacturing. The company's mission centers on making nuclear power radically simpler and more accessible by removing the burden of development, financing, and operations from customers through a power purchase agreement model. This approach aligns nuclear energy deployment with the urgent need for resilient, low-carbon power, particularly as demand from AI infrastructure and industrial growth accelerates. Last Energy's use of proven reactor technology combined with proprietary steel containment systems is designed to streamline licensing and reduce construction timelines. Last Energy represents a new generation of nuclear developers focused on decarbonizing hard-to-abate industrial sectors with firm, emissions-free power. By standardizing and modularizing the entire plant through factory manufacturing, the company aims to bring predictable costs and schedules to a sector historically challenged by both, positioning SMRs as a practical climate solution at commercial scale.

Key Duties & Responsibilities

Lead and perform complex thermal-hydraulic and neutronics calculations

Independently verify and approve engineering calculations and safety analyses prepared by peers and junior engineers

Provide expert-level review of design basis documents, licensing submittals, and technical evaluations

Mentor and guide junior engineers in analytical methods and modeling techniques

Develop and maintain detailed models for reactor systems and accident scenarios

Participate in peer reviews and regulatory interactions as a technical authority

Contribute to continuous improvement initiatives by identifying gaps and proposing innovative solutions

Adapt quickly to evolving project needs, regulatory changes, and emergent technical challenges

Qualifications

Bachelor’s or Master’s degree in Nuclear Engineering or a closely related discipline.

7+ years of experience in nuclear systems analysis, safety analysis, or reactor physics.

Proficiency with at least two of the following codes: TRACE, MELCOR, MCNP, VERA, SCALE, SERPENT.

Demonstrated experience performing and reviewing complex engineering calculations.

Strong technical writing and communication skills, with the ability to present to both technical and non-technical audiences.

Department of Energy regulatory experience is preferred