John Petherick

John Petherick is a seasoned occupational hygiene and environment specialist with more than 35 years of experience supporting mining and metallurgical operations across Ontario. He currently leads environment and occupational hygiene programs for Glencore’s Sudbury Nickel Operations.

John combines hands on industrial and consulting experience—including work in unionized settings with a strong track record in implementing ISO aligned management systems and representing employers with federal and provincial regulators. He contributes to sector initiatives through committees such as the Ontario Mining Association and the Mining Legislative Review Committee (Hygiene & Ventilation).

A Certified Industrial Hygienist, Registered Occupational Hygienist and Certified Safety Professional, John completed an MSc in Industrial Hygiene (Montana Tech). He is active in the professional community as Secretary Treasurer of the Occupational Hygiene Association of Ontario and is respected for practical, collaborative leadership and a steady focus on improving workplace health and safety.