Lin Grieve was born in Rivers, MB on the 27th September 1920 and moved to Carberry, MB a year later, where he took his early schooling. Lin moved to Winnipeg in early 1931. He completed his High School education at Kelvin Technical High School and went on to employment with the City of Winnipeg Engineering Department, Clerical Branch.

He joined the RCAF in July 1940 and went through training as a Pilot, receiving his Wings in Saskatoon, SK in July 1942. He completed an Instructors Course (Navigation) at Rivers and was posted to #5 Service Flying Training School in Brantford, ON on staff until September 1943. He was then posted to #12 Elementary Flying Training School in Goderich, ON as Officer Commanding Navigation until September 1944. He then moved to #8 OTU Greenwood, NS to train on Mosquito Fighter Bombers.

Lin was posted overseas and completed Operational Training before being posted to 613 Squadron, 138 Wing, British Liberation Army in France until the end of hostilities. He was then posted to #3 Flying Instructors School Lulsgate Bottom where he completed the Advanced Flying Instructors Course. Then with the War in Asia ending he was repatriated to Canada and discharged from the Active RCAF.

Lin joined the Air Cadet Movement as an Instructor in 1948, moving up from Chief Instructor to Adjutant and eventually Commanding Officer of 220 Red River Squadron. He was transferred by his employer to Thunder Bay, ON and while there he served on the local Executive Committee of 66 Squadron. He was appointed the President of the North Western Ontario Provincial Committee in 1968. He was transferred back to Winnipeg and rejoined the Manitoba Provincial Committee serving in several capacities. Lin was eventually named Chairman of the Manitoba Provincial Committee in 1978 serving three consecutive terms. Lin is presently a member of the Manitoba Advisory Board and was named a Life Member in 2003. Lin received the National League's Certificate of Honour in 1982.

Lin retired in December 1982 and has travelled extensively since. He and his wife Ruth were married in 1942. They have four children and four Great-grandchildren. Two of their families reside in England.