廣華醫院
Another major objective of Mackenzie during his time as Director of Medical and Health Services was to rapidly expand public-health services to satisfy ever-increasing public demand. Public hospital projects completed during his tenure included the large and modern Queen Elizabeth Hospital at King's Park, which was opened on 10 September 1963, and the North Wing of Kwong Wah Hospital at Yau Ma Tei on 30 March 1961. Other public-health-development projects completed during his tenure included the Sandy Bay Infirmary (now Tung Wah Group of Hospitals Fung Yiu King Hospital) in December 1962 and the Kowloon Rehabilitation Centre in August 1963, etc. Furthermore, the foundation stones of Tsuen Wan Adventist Hospital, Li Po Chun Health Centre and the Lions Clubs Government Maternal and Child Health Centre in Kowloon City were laid by him in June, July and September 1963 respectively.