Career
Prevey founded Edmonton City Dairy & Barns Company circa 1926 to deliver dairy products to residents in Edmonton. Prevey began his political career on the municipal level He ran for a seat to Edmonton City Council in the 1917 Edmonton municipal election.
He did not run for a second term in 1919.
Prevey ran for a seat to the Alberta Legislature as a Liberal candidate in the 1926 Alberta general election. Prevey ran for a second term in the 1930 Alberta general election but was defeated finishing in seventh place on the first vote count.
He was unable to acquire enough alternate preferences to hold his seat in subsequent counts.