The Southeastern Pennsylvania Transportation Authority (SEPTA) is the sixth largest transportation system in the United States, with a vast network of fixed route services including bus, subway/elevated, trackless trolley, light rail, and commuter rail serving a 2,200 square mile service region.     POSITION OVERVIEW: Our Center City Philadelphia headquarters is seeking an Environmental Compliance/Safety Specialist to be responsible for reviewing, assessing and successfully implementing a strategy to assure Authority compliance with the requirements of Clean Air Act, Clean Water Act, Resource Conservation and RecoveryAct (RCRA), the Toxic Substance Control Act (TSCA) and Environmental & Sustainability Management System (ESMS). This position