We are hiring a mechanical engineer who will report directly to the CEO. You will be responsible for design, development, and fabrication of direct air capture systems, associated test systems, machining, tooling, and more. You will perform fluid systems design, including component selection and integration, design of thermal systems, and system optimization. You will oversee all aspects of your projects including requirements gathering, feasibility studies, full system design, purchasing and procurement, finances, scheduling, manufacturing, contractor management, installation, and activation. Technical problems we are working on: High-efficiency, low-cost heat transfer systems for targeted heating and cooling of specialized materials; Parameterized experimental design and test system design for advanced chemical sorbent characterization and materials development; Design of a high-reliability, low-pressure, variable-purity gas capture system; Experimental design for quantification of CO2 mineralization and sequestration under elevated pressures and temperatures. Responsibilities: Design and develop test systems; Fluid system design including P&IDs, schematics, operating and test plans; Thermal systems design, including heat exchanger design and high temperature fluid and mechanical components; Component and system design in CAD; Execute tests and collect data; Data analysis and reporting; Interface with vendors and external parties. Requirements: Familiarity with design of fluid and thermal systems; Hands-on experience with thermo-fluid components (valves, pumps, heat exchangers, instrumentation, electromechanical components, etc.); Experience with CAD (Solidworks, NX, AutoCAD, or similar); Hands-on project experience designing and building products; Strong interpersonal skills; Ability to work in dynamic environments; Degree in mechanical or aerospace engineering or related discipline; Experience with technically complex systems from comparable industries; Experience designing for manufacturing/assembly; Comfortable working on a small team; Requirements gathering and documentation. Benefits: Salary $98,000–$128,000; equity; covered health, dental and vision; 401(k) with employer matching; unlimited PTO (expectation of three weeks). Not currently able to sponsor a visa; primarily based in Los Angeles, CA, but open to applications from other locations.