Gillen Company, founded in 1914, continues to be a leader in the deep foundation construction industry. Over the years, Gillen has built a solid reputation for dependable work, timely completion, innovative methods, and a cost-effective operation. Serving the customer has always been Gillen's number one priority and the central focus of the operation. Through the years, Gillen has expanded and flourished in the following disciplines in order to best serve the needs of the local areas of Wisconsin, Upper Michigan, and Illinois: