We're sort of getting back into the 'why ski schools suck' thing again... Bear in mind that different resorts are run differently. In my experience, I've never been asked or have asked, for anything to be denied, etc... by or for an employer. We have a very clear and straight forward accident (even minor accident) protocol that must be followed to document an accident or injury event for any potential L&I claims. I'm surprised though that OSHA would be called unless there was a pretty clear and present danger on the hill that was documented, or required training to navigate/work on (machinery) /etc.... I'm sure it's a bit more complicated than 'just a ski instructor skiing along, working at the ski school', and wouldn't venture to guess why the employee and employer might have ended the instructor's employment after the fact. Just not enough info, but that's gag orders for you.
Anyhow, for the OP, contact the ski school you want to work for. Everyone's looking for people this time of year. 9 to 2 will be pretty tough as most lesson blocks won't end until 3 in most cases. When I'm hiring, if I have a need for a very special skill set, and that instructor brings value and can fill that need, I sometimes make exceptions to our base required days, but I've never extended that to a new instructor FWIW. YMMV.