 During his tenure, Johannesson earned the highest flight trainer rating in Canada, one of only six instructors with that rating.From 1932, in operating the Johannesson Flying Service, he was based in Winnipeg at both the Brandon Avenue Aerodrome and Stevenson Field.His operation transported approximately 150 passengers each year into central Manitoba with his two-seater de Havilland Cirrus Moth biplane, as well as offering flight instruction.