Doug, the son of Sam and Jessie Fletcher, was born and educated in Argyle, Manitoba. He attended the Manitoba Agricultural College where he obtained a degree in agriculture. He later attained a masters degree in economics from the University of Mani toba. Doug was an agricultural representative with Manitoba Department of Agriculture, first in Shoal Lake and later in Carman. In 1937, he married Iris Campbell.
Doug was highly regarded for his ability in the field of farm management, particularly his technical competence in soils and crops. He was an early promoter of soil testing in the Carman District and the establishment of the Mani toba Soils Testing Lab. Upon his retirement from Manitoba Agriculture in 1971, Doug was elected mayor of Carman, where he was active in the Pembina Valley Development Association and the Lower Red River Valley Water Commission. He was the driving force behind the Boyne River Diversion to prevent flooding in Carman.