RENNtech, a global leader in high-performance automotive engineering, is seeking an experienced engine builder to join our team in Stuart, Florida. Founded by former AMG North America Technical Director Hartmut Feyhl, RENNtech is known for pushing the limits of performance across both street and race platforms. This role is ideal for a precision-driven professional with a deep understanding of internal combustion engines and a passion for high-horsepower builds. You’ll be responsible for assembling and rebuilding high-performance and race engines—including Mercedes-AMG platforms like M113, M156, M178, M275, and more—using best practices for blueprinting, measurement, and clean-room protocols. Experience with forged internals, high boost applications, and dry sump systems is a plus. The right candidate will have some years of professional engine building experience, demonstrate exceptional attention to detail, and be comfortable working independently as well as part of a performance-driven team. We offer competitive pay, benefits, and the opportunity to work inside a clean, climate-controlled facility on some of the most powerful builds in the industry —apply now with your resume and any examples of past work. The ideal applicant must be willing to move to Stuart, FL. Air Conditioned, state-of-the-art facility. 

Deep understanding of internal combustion engines and a passion for high-horsepower builds.

Some years of professional engine building experience.

Experience with forged internals, high boost applications, and dry sump systems is a plus.

Able to commute to our facilities in Stuart, FL. Allowed to legally work in the US.