Major-General W. A. Clay CMM, OStJ, CD, QHP, MD, MHSc (born 27 September 1942) was the 33rd Canadian Surgeon General.
During this period, she took a six-month study break to complete the advanced aviation medical course with the Royal Air Force (RAF) in Farnborough, England.
In 1977, Clay was promoted to lieutenant-colonel and joined the staff of the Canadian Forces Institute of Environmental Medicine in Toronto[6] as the director of Medical Assessment and Training Division.
During this posting, Clay completed a six-month tour of duty with the Canadian United Nations contingent to the Middle East in Egypt.
In 1989, Clay was promoted to brigadier-general,"[9] and returned to Ottawa as commandant of the National Defence Medical Centre (NDMC).