Gylan Building Services is a full-service facilities maintenance business based in the Dallas-Fort Worth area. The company has been in business for more than 25 years. It employs 100-plus people and services in excess of 2 million square feet of space. Gylan Building Services offers property maintenance, custodial, carpet shampoo, exterior window washing, and concrete, parking lot and construction cleaning services. The company also features clean room capabilities. It has expertise in sweeping, vacuuming, mopping, floor waxing, polishing, and trash and recycling collection. Gylan Building Services has served such clients as Americredit, CB Richard Ellis, Siemens and Nissan of North America. The company maintains a location in Dallas.