He worked in the Engineering section designing aircraft hangars, warehouses and refitting many existing buildings for use by the army.
In the 1950s, 1960s and 1970s his architectural practice in Rockhampton undertook civic, commercial and domestic work throughout Central Queensland.
In Central Queensland he designed the North Gregory Hotel Winton (with Engineer Jack Mulholland), Longreach Fire Station, Emerald Fire Station, Alpha Town Hall and Jericho Town Hall.
The practice closed in 1980, but Hegvold came out of retirement in 1984 to design the new fire station and residence at Emu Park.
He was responsible for planning, designing and organising to have the amenities at the Victoria Park basketball complex constructed.