SERVICE TECHNICIAN. Duties and Responsibilities. General Description. A Service Technician cleans and services customer areas to ensure the safety, health and morale of customers, visitors and employees, by helping to provide a clean, attractive, safe environment with minimal interference to others. Principle Duties and Responsibilities. 1. Sweeps, mops and damp-mops floors. Periodically cleans and/or polishes floors using buffing machines. 2. St...