The worker was killed after being run over by a mobile crane that was removing the Sauber of Esteban Gutierrez from the side of the track after he crashed in the closing stages.
Vettel, oblivious to the unfolding tragedy, captured his first Formula One victory on North American soil and extended his overall lead in the championship to 36 points over Ferrari's Fernando Alonso, who finished second.
Lewis Hamilton, who had won in Montreal three times before, was passed by Alonso seven laps from the end but made it a podium of champions by finishing third for Mercedes.
Vettel, cruising to his 29th career win with little resistance, took the chequered flag 14.4 seconds clear of Spaniard Alonso.
In Image: Red Bull driver Sebastian Vettel, center, of Germany jumps up on the podium after winning the Canadian Grand Prix in Montreal, Sunday, June 9, 2013 as second place Ferrari driver Fernando Alonso, left, of Spain and third place Mercedes driver Lewis Hamilton of Britain look on.