Mackersie is a Board certified general surgeon with board certification in surgical critical care with a regular, sustained practice in general and trauma surgery, which includes vascular and thoracic surgery. In addition, he is a regular attending on the Surgical Critical Care Service at San Francisco General Hospital and serves as the Vice-Chief of Surgery at San Francisco General Hospital.
Dr. Mackersie is a graduate of UC Berkeley and Michigan State University Medical School. He completed his internship, residency and chief residency training in general surgery and surgical critical care at the University of California, San Francisco, where he continued his specialty training and completed a trauma research fellowship. Dr. Mackersie joined the faculty at the University of California, San Diego University Hospital from 1985-1991.
Dr. Mackersie was appointed the Trauma Medical Director in 1992 at the University of California/San Francisco General Hospital and has been instrumental in expanding the multidisciplinary activities related to the Trauma Program. Dr. Mackersie currently serves as an officer for several surgical organizations and is a Governor of the American College of Surgeons. Dr. Mackersie has been appointed Secretary/Treasurer for the American Association for the Surgery of Trauma. Dr. Mackersie has also expanded the Trauma Nurse Practitioner program, and has progressed in developing the first aero-medical transport facility at San Francisco General Hospital. He has also been appointed Commissioner for the State of California Emergency Medical Services Authority, which is appointed by the Governor/California Speaker of the House.
Dr. Mackersie continues to direct the national program in Trauma System Planning and Evaluation for the American College of Surgeons, which includes the development of national benchmarks for trauma systems and trauma centers, and the creation of national guidelines for trauma systems development.