About Us
Firm Profile
Nilles Associates, Inc. (NAI) is a full-service Civil Engineering firm located in Ankeny, Iowa.  Established in 1996, we have grown from a small surveying firm to a mid-sized full service Civil Engineering firm serving a wide range of private and public clients.

Under the leadership of John P. Nilles, PE, PLS the Company has grown to become a leader in providing innovative designs for projects such as reverse osmosis water treatment projects and a  new 1,100 acre urbanism community.  Our visionary team of personnel gives NAI the ability to provide our clients with cutting edge design solutions.

Solid Foundation
The Structure of NAI is built on the solid foundation of design professionals with several years of design expertise that bring a diverse catalogue of project-related experience.  The variety within our experience gives our staff a wealth of expertise to draw from when working on challenging projects.

 We continually strive to add quality design professionals to our team who have the drive, desire and character to succeed.  We have on staff professionally licensed/certified personnel in the following disciplines:

● Licensed Professional Engineers
● Licensed Land Surveyors
● Licensed Landscape Architects
● Certified Professional in Erosion and Sediment Control
● Engineers in Training
● Certified Materials Testing

Design Philosophy

Quality, Efficiency, and Partnerships
We continually strive to make quality and teamwork the cornerstone of our firm.  Most importantly, our ability to partner with our clients to work towards their goals allows us to develop long-term relationships with them.  Developing professional partnerships makes repeat business and referrals one of the strengths of our firm.

NAI continually invests in new technologies such as CAD software, GPS Robotic Equipment, GIS Software, and hydrologic modeling systems that allow NAI staff to quickly and efficiently meet the needs of our clients.  We have established and continue to update standards related to quality control for designs, drawings, and reports.  Our work is our best advertisement…our reputation depends on it.

Project Diversity and Innovation
Nilles Associates continues to develop and maintain a balanced portfolio of projects supported by a variety of clients.  No project is the same, and we work to find the most effective solution for each unique situation. This philosophy allows our firm to design innovative projects such as large-scale reverse osmosis nitrate removal for water treatment systems and planning/design of sustainable and low impact design projects that address storm water quality.