I'm having a bit of a issue with three of my Bridge Officers.
I've just hit Lt. C Grade 3 (still a lowbie) and i've promoted my four officers to lieutenant thus allowing me to spend points into their second abilities. However, only one my officers second Space ability even shows up as being usable. The other three "evidently" don't have a usable second ability even though i've spent points into them.
Ships limit what BO space skills are available to you, however there is no such limiting factor on the ground, so all of them will have their 2 (or 3 or 4 based on rank) ground skills available to you.