Nilles Associates began as a small land surveying firm in 1996 and has grown to a full-service civil engineering, land surveying, and landscape architecture firm serving a wide range of private and public clients. Under the direction of John P. Nilles, PE & PLS, the company has become a leader in municipal engineering, land development, stormwater resources design, and master planning. We have provided innovative designs for projects large and small throughout the Des Moines metropolitan area and throughout the state of Iowa.