n. [skil]: Expertise used to provide unmatched clean. Clarke Site Manager Trainee We are PSSI. We redefine clean. People are at the heart of everything we do. We are the nation's #1 contract sanitation company that helps you protect people, food and your brand, while keeping you on-time and audit-ready. See how at redefinecleanPSSI.comhttp://www.redefinecleanPSSI.com