Why do 90% of the clients that Zak | Companies, Inc.
works with become repeat clients?

The reason is simple:
We put the client at the very center of our business.

For over 40 years, Zak | Companies, Inc. and predecessor firms have built a strong foundation on client trust...by exceeding expectations every step of the way.


We offer the full spectrum of consulting engineering services, program management, and subcontractors and deliver them nationwide. From offices in St. Louis and Springfield, Missouri; Belleville, Illinois; Houston, Texas; and Phoenix, Arizona;  Zak Companies professionals deliver on the corporate mission by consistently putting the client/owner first.

"We will provide the best services to meet our clientsĄŻ goals. We will be industry leaders in developing new design methods and standards. We will provide our clients with the most innovative, flexible, efficient, and cost-effective systems within the budget of the project. Our standards will become the measure against which our competitors will be judged."