I was trying (not so hard) to find this report on the forum, and did not succeed.
There is one feature (?) which seems like a bug to me.
When you are in an asteroid field, and you evade an asteroid, you crew members (pilot and mechanic (the one who is in engine bay)) do not receive skill point as pilot and mechanic. But when an asteroid hits shields, your shielder gets skill points.
This allows to get the highest skill even in first sector. You just defeat your enemy, leave your ship in an asteroid field (unpaused) and go and dring coffee, or write some code. After 15-20 minutes you've got full shield management skill.
I really hope that this will be fixed in the coming big expansion

P.S.Thanks for the great game! I enjoy almost every aspect of it.