There two professional diving schools on Saba; Sea Saba and Saba Deep. Both are qualified. Saba is # 8 on the list of the best diving sports in the whole Caribbean. You can find that on Google.
I can’t give you more information about them, because I’m not a diver. I can’t clear my ears….that’s a pity. I’m a hiker…and I like that……..yesss…..