WestJet today announced the appointment of a new Executive Vice-President and Chief Operating Officer (COO) Diederik Pen, who will join the airline’s executive leadership team in the early fall, following the completion of the immigration process. At that time, acting interim COO, Robert Antoniuk will take on a new role as Chief Safety, Health and Environment Officer. “WestJet is in an exciting position to successfully compete in the rebuild of the aviation industry, and I look forward to being a part of that story.”