About Us: United Maintenance Corporation is a minority owned commercial building and facilities services contractor based in ... Charlotte, North Carolina with accounts in North Carolina, South Carolina, Virginia and Maryland. We are currently servicing over 17,000,000 square feet on a daily basis. UMC is in compliance with the latest green seal practices. Company Services: UMC offers janitorial services for all types of commercial properties from office environments of any size to medical cleaning and industrial facilities. In addition to janitorial services, we also offer carpet cleaning, hard surface cleaning and construction clean up. Professional Memberships: UMC is certified through the National Minority Supplier Development Council, as well as a current member of Building Owners and Management Association (BOMA). read more