Our History

Privately owned & operated since 1978.

Site Development, Inc. (SDI) is a privately owned multi-faceted corporation headquartered in Madison Heights, Michigan.

We are not just earthmovers- we provide a complete site preparation and development process to all of our projects.

Our Story

Our president and sole Owner of the company, Leonard J. Theisen, has been in the construction business his entire career as a hands-on leader for the company. Established in 1978 as an earthwork/underground utility contractor, the company has been providing our clients with an overall approach to site work from a site logistics point of view.

Leonard J. Theisen, the founder of Site Development, Inc., wearing a white button up shirt and a Site Development, Inc. hardhat.


Our Projects

Each of our project's endeavors include not only competent managers, engineers, superintendents, labor foremen, laborers and operators, but a management system to assure the project is done correctly, efficiently and on time.

The management system includes processes that include Cost Control, Schedule Management, Value Engineering and Constructability Reviews.