Never worked there but had a few interns from AMR SF.
Looks like a lot of IFT with maybe 4 911 rigs a day.
Fire Department handles the majority of 911 ambulances in SF.
AMR SF is 90% <5 years on the job. In other words, it's a lot of kids getting not-so-great 911/IFT experience.
I'm biased and think SF is a great place but I also think it's where good paramedicine goes to die.
If SFFD opens i'd say apply for a EMT spot there. You can even apply just to be a firefighter right now if you wanted to.
The other 911 option in SF is King American. In my experience it looks loads better than AMR SF.