Oak Forest Lumber & Supply is a part of Marek Family of Companies, which specializes in the areas of residential and commercial interior construction. Founded in 1938, the company has worked on several projects, such as Anadarko Tower, Bellsouth Midtown and American Airlines Center. It maintains a shop that provides a range of products, including caps, shirts and jackets. Marek Family of Companies also operates Marek University, which was established in 2000 and offers education al and training services. Marek Family of Companies additionally owns and manages Marek Brothers Systems, Forest Lumber & Supply, Marek Brothers Company and Marek Interior Systems.