Welcome to PSC, where expertise, experience and innovation come together. You'll find Experts in the Field to solve all of your industrial cleaning, environmental services, and transport challenges.With thousands of dedicated employees located across the United States, Canada, Mexico, and Puerto Rico, PSC has nationwide strength with strong local commitments.What does PSC stand for? People, Service and Commitment. As the industry leader, we don't just promise these qualities. We live them every day. This is PSC Now.