John Walker was the superintendent of the federal Tree Nursery at Indian Head from 1942 until his retirement in 1958. He graduated with a BSc (Ag) from University of Alberta in 1924 and became Asst Superintendent (Horticulture) at the Indian Head Experimental Farm in 1925, at the same time as continuing his studies. Graduated with an MSc from University of Minnesota in 1926. Extension Horticulturist of the Manitoba Department of Agriculture 1929-1942. Married Violet Fotheringham in 1929. Father of Indian Head pharmacist Spence Walker