SPIRE ENGINEERING, INC. is a full-service structural engineering firm in Milwaukee, Wisconsin. founded by Alan Rentmeester in 2009. In 2020, Brian Rinke and Brian Genduso joined Alan as shareholders, forming a leadership team of diverse talents and perspectives.

Spire’s team is proud to provide creative solutions to complex problems with a focus on ease of constructability and economical design. By effectively listening to client goals, we tailor our services to benefit individual projects. We actively strive to be responsive, proactive, and focused as a team to solve problems, maintain schedule, and provide excellence in structural design.