Tribunal decides worker's asbestos exposure 'was ongoing and repetitive'
A very old job description ended up settling a hard-fought workplace cancer case, undercutting the employer's core defence and finally giving a worker's estate the benefits it had chased for years.
In a ruling dated July 13, 2026, Ontario Workplace Safety and Insurance Appeals Tribunal vice-chair T. Mitchinson sided with the estate of a worker who died of esophageal cancer in 2002, granting entitlement to benefits for an asbestos-linked illness.
The tribunal found that records for a similar role at the worker's old job contradicted the employer's claim that he mainly sat at a desk.
Cancer claim decades later
For 45 years, the worker stayed at the same industrial plant, starting as a stationary engineer in 1952 and later working as a millwright until 1997. He was diagnosed with esophageal cancer in December 2000 and died just over a year later. His estate filed a claim with the Workplace Safety and Insurance Board in January 2018, pointing to decades of exposure to asbestos and other carcinogens on the job.
A WSIB reviewer looking at the claim found only intermittent, limited potential asbestos exposure, nothing close to the steady, heavy contact typical for asbestos insulators or miners. A follow-up medical review confirmed the cancer diagnosis but found no clear tie to known esophageal carcinogens, and concluded the worker hadn't worked in an industry linked to that risk.
By 2022, the officer reviewing the appeal had upheld the denial, finding "insufficient evidence to support the presence of a clear and adequate history" of asbestos exposure on the job. The officer leaned heavily on a medical consultant's opinion that the worker's industry wasn't one tied to esophageal cancer.
Asbestos exposure at work
In response, the estate's representative said even lighter asbestos exposure, spread across three decades, should still count, pointing to an updated 2024 version of WSIB policy as a guide for weighing cumulative exposure. According to his submissions, WSIB policy allows a claim to be judged on its own merits even when it doesn't fit neatly into existing definitions.
How the worker spent his days became central to the case. Years after the fact, an employer official maintained that a fourth-class stationary engineer in the 1950s and 60s mostly worked from an office, only occasionally stepping onto the plant floor. Both the WSIB reviewer and the appeals officer leaned on that account when turning the claim down.
That explanation didn't convince the tribunal panel, which dug into job descriptions for a similar role, the second-class stationary engineer, and found duties packed with hands-on work: running boilers, operating cranes and forklifts, and preparing asbestos samples under the plant's own safety procedures.
That record, the panel said, didn't line up with a job spent mostly behind a desk, and a more junior role like the worker's would likely have meant even more physical, hands-on work.
From exposure to diagnosis
Weighing it all, the panel found the worker cleared the required 20-year gap between his likely first exposure and his cancer diagnosis, and that his job involved steady, hands-on contact with asbestos that was a major part of the work. On that basis, the tribunal allowed the appeal, giving the worker's estate initial entitlement to benefits for esophageal cancer tied to the job.
In its own words, the panel summed up the shift: the worker's asbestos exposure "was ongoing and repetitive throughout the working shift," meeting the bar WSIB policy sets for these decades-old exposure claims.
WSIB will now work out how much the estate is owed, a step that can still be appealed. The employer sat out the tribunal hearing that decided the case.
