Mechanical Engineer

Mechanical Engineer at Mersenne LabsAbout The RoleAs Mechanical Engineer, you will play a significant role in developing and implementing engineering plans and strategy for a high-growth deep-tech company in stealth mode. We are seeking a highly skilled Mechanical Engineer with expertise in integrating complex systems and a strong background in thermodynamics, computational fluid dynamics, and solid mechanics. Background in nuclear energy is highly preferred, but not required.ResponsibilitiesDesign: Lead the design and development of the company's product components to meet safety and performance standards.Component Integration: Ensure seamless integration of various components of the product.Materials Selection: Select appropriate materials and components to optimize strength, weight, and durability of the product.Safety and Compliance: Ensure product design complies with safety regulations and standards, conducting necessary safety tests.Collaboration: Work closely with cross-functional teams and suppliers to achieve efficient and innovative component design while maintaining cost-effectiveness.QualificationsEducation: Bachelors, Masters, or PhD in Mechanical Engineering.Experience: 5+ years of industry practice.CAD Proficiency: Proficiency in computer-aided design (CAD) software.Material Science and Solid Mechanics: Strong understanding of materials science, with focus on heat and radiation shielding, as well as engine design (including battery-powered motors, turbines, and Stirling engines).Testing and Prototyping: Experience in planning and conducting component testing and prototyping.Problem-Solving Skills: Strong analytical and problem-solving abilities for technical challenges.Communication: Effective communication skills for collaboration with cross-functional teams and suppliers.Work Authorization: US Permanent Resident or US CitizenBenefits$80,000 - $500,000/annual salary + cash and stock awards + benefits. Pay offered may vary depending on multiple individualized factors, including market location, job-related knowledge, skills, and experience. The total compensation package for this position may also include other elements dependent on the position offered.Along with competitive pay, as a full-time employee, you are eligible for a slew of benefits, including premium vision, dental, and medical plan options, unlimited PTO, and other financial benefits, commuter benefits, and more.Created at 2025-05-07 19:35:27Updated at 2025-10-07 14:30:46Location: Onsite (Washington, DC)About Mersenne LabsAbout usMersenne is designing the world’s first “forever” generators, with a vision for a radically new form of long-lasting energy for Earth, space, and beyond — moving humanity away from constraints of grid electricity and fossil fuels. To achieve this goal, Mersenne is designing a mass-produced fleet of nano-scale nuclear reactors.Team backgroundMersenne is led by accomplished technologists and founders along with a core team of nuclear, material, and mechanical engineers with experience in micro-reactor design and construction from leading facilities. We are hiring for key leadership positions to accelerate engineering milestones and take Mersenne out of incubation. Additionally, we are building a team of regulatory experts and public sector specialists to capitalize on the opportunity in our shifting regulatory environment.Benefits and perksCompetitive salary and performance-based bonusesComprehensive health, dental, and vision insuranceFlexible working hours and remote work optionsGenerous paid time off and holiday scheduleProfessional development opportunities and continuing education supportCollaborative and inclusive work environmentWhy you should work hereAt Mersenne, you will have the opportunity to be part of a groundbreaking initiative that is set to transform the energy landscape. We value innovation, creativity, and a commitment to relentless excellence. By joining our team, you will work alongside some of the brightest minds in the industry, contribute to meaningful projects, and help shape the future of energy.Open PositionsMersennelabs - Sample JobMersenne Labs - Nuclear Scientist and EngineerMersenne Labs - Mechanical EngineerMersenne Labs - Head of FederalMersenne Labs - Thermohydraulic Test Engineer