Based in Durham, N.C., The ServiceMaster Company, a Six Sigma company, specializes in janitorial services, carpet and rug cleaning as well as floor waxing/polishing. The company has been operational for more than 50 years, offering a range of services, such as preliminary inspection of carpets, pre-treatment of spots and stains, carpet grooming, tile and grout cleaning, disaster restoration and green cleaning among others. In addition, The ServiceMaster Company operates more than 4,500 franchises around the world.