Now 35 and living in Southwest Philly with his wife, wife's mother, and two toddlers, Fisiha is one of six parking lot attendants who were fired last month for trying to form a union, according to SEIU 32BJ, which is working to organize valets around the city. Their experience offers a window into the challenges private-sector workers face when trying to unionize. The valets who lost their jobs, nearly all immigrants from Africa, worked at parking facilities at the Hospital of the University of Pennsylvania (HUP) run by parking giant Impark, short for Imperial Parking. Impark spokesperson Leonard Calder said allegations that the company fired employees for union activity are "unfounded," adding that it respects its employees' right to choose whether to join a union.