When cleanliness is essential, call GMP Services. We are a leading janitorial and contamination control company that has been serving Massachusetts for more than 15 years. Our clients include top companies in the biotech, aerospace, and semiconductors industries, and we specialize in decontaminating cleanrooms. We also serve military and defense contractors, chemical companies, medical device manufacturers, and variety of other clients. GMP Services is a women-owned minority business, specializing in cleaning and janitorial services in Hopkinton, Massachusetts.