C, C++ - whoowho! Learn about control systems, design and implementation, control circuit design, trouble shooting including hard wired logic. Most control systems have hard wired logic.
A bit of paper to me is useless - a wealth of knowledge and experience is. Hard to get there though.
I am an old fashioned hard liner - I always look for an electrical fitter who has gone on and done something further down the line. That is my background and never a regret.
I have an Electrical Engineering certificate, Business Management Degree, Marketing Management Degree, various certificates in the instrumentation area.
I would try to get a job in a systems house if I were you - they have people from virtually every discipline and they all learn from each other. They also work as a team - read plenty of spread sheets running around between the various disciplines.
Not my bag - I am a loner - but I have some very good friends who have worked in a systems house and they have learned from everyone else and are very good at what they do.