Founded in 1968, Mark Line Industries manufactures high quality mobile offices for the construction industry. Located in Roxboro, N.C., the firm builds thousands of single and multiple story modular structures, including classrooms, schools, child day care centers, retirement centers, medical clinics, diagnostic buildings and many more. It caters to various sectors, such as commercial, institutional and government in the areas of Indiana, Pennsylvania and North Carolina. The firm also serves with structural components to building contractors and commercial developers.