I was actually thinking about implementing a system similar to what I used playing X-COM - that is manually adding "proficiency badges" to members.
What I did was edit their names with symbols indicating their strong skills and/or utility; fhe ones I used were - marksman, heavy gunner, medic, psionic, psi-resistant.
To be perfectly honest would love to see that as a part of UI in Xenonauts!
PS: First post! Whoop! Still waiting to get my medal from the Kickstarter backing!