American Engineering Testing, Inc., (AET) is a 100% Certified Employee-Owned civil engineering company headquartered in St. Paul, Minnesota. Founded in 1971, AET has over fifty years of experience providing geotechnical, construction materials testing, building technology, environmental consulting, forensics, petrography/chemistry, and specialized laboratory services.

In 1990, AET became employee-owned when it established its Employee Stock Ownership Plan (ESOP). Their mission consists of working together to build a more certain world that transcends their project work. Life-long learning has always been a top priority at AET for team members and colleagues. AET employee-owners are known for their diligence, teamwork, technical expertise, and their problem solving skills. AET's ownership culture aims to reduce uncertainty while delivering continuity to their client's projects, leveraging their employees' strengths and capabilities.