He worked for the Royal Dutch Shell companies in various countries for 39 years, after the war. For part of that tenure he worked as Chief Geologist for Shell Canada Ltd.
He was elected mayor of Bowness, Alberta in 1958.He was a founding member of the Calgary Eco Centre.He (co?) founded the Western Affairs Committee.He was Director of the Pensador Institute.
The trilobite species Pseudodechenella petermoorei ormiston is named for him.