Dr. David was a Canadian naval surgeon in the Persian Gulf War in the year 1991. He was also the medical director of Commonwealth Games in gymnastics and as a former team doctor in national rugby teams and in the junior and professional hockey teams. From the year 1995 to 1999, he worked in the General Practice department of Esquimalt Medical Treatment Center. In the year 1999, he started working at Yates & Quadra Medical. After this, he served as Clinical Instructor in 2005 for Nurse Practitioner from B.C and the two years later he worked as Clinical Faculty at UBC School of Medicine.