On September 19, 2013, President Barack Obama nominated Heyman to be the U.S. Ambassador to Canada. Heyman was confirmed by the U.S. Senate on March 12, 2014. He replaced Ambassador David Jacobson. As the U.S. Ambassador to Canada, Heyman became a member of the Fulbright Canada Board of Directors. In 2014 and 2016, Heyman was named one of the Top 50 Most Powerful Business People by Canadian Business.
