I am a 44yo T1 diabetic. I was diagnosed in August 2001. I have been on an insulin pump since 2009, and added CGM in 2015.
I did my first tandem in 2011, and one every year until my 3rd when they asked at the DZ, "Why don't you learn to jump by yourself?"
I finally signed up for 1st jump course in 2015. Life changes caused a delay in completing my AFF, but I finally did and got my A in February of this year.
I didn't ask my Doctor if it was OK for me to start jumping, I just did it. I told him later and he wasn't really thrilled about it. He said, "What does the pump manufacturer say say about this?" I told him I didn't ask.
When I first started AFF I would take my pump off before I jumped. When I got comfortable jumping, I started leaving it on. I haven't had any problems with it so far, I have 47 jumps. At about 8k I unzip my jumpsuit and check my BG via CGM. I try to make sure my BG is at least 140 before I jump, especially if I have any IOB besides my basal, and if it isn't I eat a packet of the fruit snacks I carry in my jumpsuit before I zip back up, reattach my chest strap, and wait for the 5 minute call.
My suit is tight and depending on where my infusion set is attached that day, sometimes binding causes an occlusion in my tubing. If that occurs, I just remove the pump and reprime it after I get back on the ground. Sometimes it's kind of funny when I am under canopy when my audible is beeping at me and so is my insulin pump.
I have never lost consciousness from a diabetic episode at any time in the last 16 years, but you will never catch me jumping without an AAD just in case I have a first time and it's while I'm skydiving.
So far, so good.