Hi Colleen,
I registered to this site just to answer you, well ok and I am sure I will check out other things and get into all sorts of trouble ha ha. I am a commercial diver, female, not Canadian but Mexican; as minority as you can get in the field (yep, I'm also short). I work inland in Nuclear Power plants. I made the jump from SCUBA instructor to Technical (cave diving) to commercial. If you are thinking about it do it OUT OF LOVE for diving. That is the only way you will make headway. I don't nkow if I am lucky or what but I started out with rough times and was convinced I'd write a book about how tough it is to be a female commercial diver. Closing in on my second year I realized that it was no longer as tough and that I have a few (not all: you cannot have EVERYONE like you) very close diver buddies at work who call me "little sister". It has been the most amazing time of my life. Colleen, if you love being in the water and are comfortable it will work for you. It will require a lot of hard work and determination and patience and yes, you must be in better shape than most of the guys just to keep up. I have trained in welding, burning, plasma cutting and coatings and I am certified in all except welding in nukes (I still hope to get certified for this someday). The pay sucks, the hours can kill but it's all worth it when you get to dive and you do a good job.
I do not have email access at home and I will be on the road but I check my email and I am more than glad to help you in any way, with any questions.
Kyra