Ferdinand Regier is an architect (OAA) who lived in Yellowknife from 1996 to 2000. During his time in the city, he worked on projects throughout the NWT. Mr. Regier currently works for the Government of Canada.

The Department of Infrastructure was established April 1, 2017 with the amalgamation of the Department of Public Works and Services and the Department of Transportation. Infrastructure is responsible for strategic planning of public transportation infrastructure (including roads, bridges, ferries, and airports) and energy production and distribution systems; the disposal of surplus government property and goods; environmental impact assessment/regulatory review and approval; information management and technology; Marine Transportation Services; mechanical/electrical regulatory services; motor and vehicle services; planning, design, construction, acquisition, operation and maintenance of public buildings and transportation infrastructure and systems; energy conservation and efficiency programs; property management; and remediation of public infrastructure.

E.T. “Ted” Lonergan and his wife Vera arrived in Yellowknife from Box Mine in Goldfields, Saskatchewan. Prior to working at Box Mine, Ted worked in the oil sands. He was a carpenter by trade and had his own construction company. In Yellowknife, he was a miner and shift worker at Con Mine.

The Lonergans remained in Yellowknife until 1943, when Ted joined the Royal Canadian Navy. After the war, he returned to Yellowknife and went to work at Giant Mine. He left Yellowknife in the early 1950s.

In the mid-1980s, he was living in Vancouver and working as a Project Supervisor and Coordinator at Placer Development Limited.

Construction of the Mackenzie Highway system began in 1946. Work on the highway from the Alberta boundary to Hay River was completed in 1948.

John Reid Day was born in Dealy, Saskatchewan on April 19, 1912. In 1937, he was hired by Cominco to assist in the construction of the camp at Yellowknife. In 1938, he worked as an independent contractor in Yellowknife and employed by various companies, including Cominco. In 1939, he worked for Cominco and Thompson-Lundmark in Goldfields, Saskatchewan. He left the north in 1940 but returned in 1945 to supervise construction at Negus mine until 1948, when he again left the north. From 1959 to 1960, he worked at a Distant Early Warning (DEW) Line site in the eastern arctic. In 1970, he retired to Anglemont, British Columbia.

Norman W. Byrne was born in Sault Ste. Marie, Ontario on February 17, 1912. Although he had first travelled to the NWT with his father, who was a prospector, and his brother Jerry in 1932, he returned to McGill to complete his studies. In 1936 after graduating from McGill University with a degree in Mining Engineering, he moved to Gold Fields (Uranium City) and later to Outpost Island where he worked as a Mine Engineer. In 1940, with the closure of the mine at Outpost Island, Byrne moved to Whitehorse where he worked on the Canol Pipeline. In 1945 Byrne moved to Yellowknife and was asked to survey the Discovery claims. Byrne was so impressed with the claim that he, along with his father and brother, purchased it. Mining work then began at the Discovery Mines Limited property and on February 10, 1950 the first gold brick was poured. After the first 17 years of operation, over $35 million had been extracted from the Discovery Mines Limited claim.

Despite Byrne's involvement with the Discovery claims, he continued to work as a consultant
Mining Engineer. He was also involved in developing Rayrock Mines Limited, Northland Mines Limited and Tundra Mines Limited. In 1964 Byrne began a second career as a real estate developer in Yellowknife and his company constructed many houses and apartment buildings in the town. He was a strong supporter of the lobby group working to have the capital city of the NWT established at Yellowknife rather than at Fort Smith. He was also actively involved in many community organisations in Yellowknife and was a vocal advocate of the establishment of a separate Catholic school system in the community.
He was the chairman of the Separate School Board from its inception in 1951 until his death on November 14, 1973.