To spare the need to get a skill for your crew member, only to find out he/she/it gets benefits from other crafting skills, it should be noted in their 'Characters of Note' section, just like their 'likes/dislikes', attribute specialties and weapons.
This would also allow people to decide which ones to pick for their crew member more on the fly/in-game, rather than having to scour the forums for what their crew members excel in their skill set.