'He was employed at such a safety-sensitive workplace where the default position is one of dismissal'
![Positive test, management observations, expert opinion add up to firing for workplace impairment](https://cdn-res.keymedia.com/cdn-cgi/image/f=auto/https://cdn-res.keymedia.com/cms/images/ca/126/0379_638465644348444945.jpg)
“Cannabis is not as predictable as alcohol and it's not linear in its impacts on the human body - that's why, when you're trying to uphold discipline, you often need an expert to provide an opinion on why we care about impairment and the signs of impairment.”