The Physicians Diagnostic Services Center (PDSC), Inc. began in 1978 as a modest medical and dental facility crammed in a 32 square meter office at the Prudential Assurance Building in Intramuros. Dr. Pedro de Guzman, its Founder and Medical Director, managed a staff of seven (7) employees consisting of a physician, a dentist, an optometrist, a medical technologist, an x-ray technician, a psychometrician, and a nurse. PDSC specialized in occupational medicine. With company retainerships, the clinic rendered pre-employment medical examinations for businesses such as the Central Textile Mills and for employees of the North and South Harbors. Students of the Pamantasan ng Lungsod ng Maynila (PLM) submitted to physical examinations at the clinic.

  In the latter part of the year, as Dr. De Guzman was determined to serve the steady stream of Filipino workers seeking employment abroad, PDSC terminated its corporate service contracts to focus on the overseas Filipino workers’ (OFW’s) pre-employment examination needs.