Jahnke & Jahnke Principals and Professional Engineers have over 50 years of experience working closely with private, corporate, and municipal clients to help them achieve their goals economically and efficiently. In 1961, John W. and Richard P. Jahnke formed the partnership of Jahnke & Jahnke Associates to provide consulting services in civil engineering, water resource engineering, surveying, and municipal planning. The firms staff has years of quality experience and you can be confident that you will get exceptional personalized service year after year.