William Tao & Associates, Inc. (WTA) is a multi-discipline engineering firm providing service for over 50 years to clients in the public and private sectors. Recognized as a leader in innovative engineering and energy-effective building systems, our practice is centered in the Midwest with projects throughout the world. As of August 2018, we joined Mazzetti, a global MEP engineering and technology consulting firm, providing our clients expanded expertise and geographical locations. Discover more here.

WTA provides a wide range of engineering services including mechanical, electrical, plumbing, fire protection, building automation, structural, civil, master planning, and commissioning.  In addition, our ability to complete most specialty disciplines in-house simplifies communications and enhances efficiency.

A diversity of project experience brings high quality and fresh ideas to our designs.  Project types include college and university, elementary and secondary schools, government, recreation facilities, office buildings, data centers, health care facilities, laboratories, and religious facilities.

Through the many years of professional service, WTA has developed long-term relationships with major architectural firms, developers, and contractors, as well as institutional, industrial, and commercial building owners.  Testimony to WTA’s successful performance is demonstrated by the extensive number of projects completed for repeat clients.