Good luck with your engineering future. When I left Uni I also looked at working in the paintball industry, and almost went to work for a paintball company, but it's not that easy.
Certainly in most cases there are more opportunities and money to be made in other areas of industry. Automotive and aerospace being two busy areas for CAD/CAM.
If you are good with CAD and want to work in that area, go for it! You can make decent money (especially if you are good!) and there are plenty of jobs in that area where good people are needed. But maybe not so many opportunities within paintball.
I run the UK subsiduary of a CAD/CAM company and for fun have been known to do a bit of design work on paintball stuff. I did the C&C extreme e-mag and am working on one or two other projects
How far along 'in looking into engineering' are you? How old? and are you at Uni or going etc? If you want some work experience in CAD/CAM to see if it is right for you, I can help you out. Heck, you could even work on something we could make into production... Want to design your own gun milling? Maybe even do an article on it for PGI? Ask Ant it might be a cool project and article...
As for how much is it used in the industry? Well not enough
but it is being used more and more. As paintball becomes more mainstream the need to design and develop components to be production ready means more and more CAD and CAM. CNC seems to be the latest buzz word in Paintball.
Initial design in CAD may take a little longer but it can be fine tuned and production ready so much more easily and with better results. As paintball grows CAD/CAM will play a bigger part.
When at the IMTS show in Chicago we even had someone from a major paintball company come and ask us at our booth about how to reverse engineer stuff into paintball gun bodies... I'm working on something just like that at the moment...
where we took a physical hand made piece and reverse engineered it be part of a gun body design...
If you take a look at our web page here
http://www.tebis.com/tebis_neu/index.php3?LNG=en&R1=01&R2=01&R3=00&R4=01 you can see 'Carmen' which John Bonich wants me to integrate into a gun body for him
That was a 'physical' piece
which we then reverse engineered into a CAD model before 5 axis machining it.
CAD/CAM in use in paintball? Well apart from gun bodies such as the Intimidator Dragon, C&C extreme and Belsales Evolution, products such as Hoppers, and goggles are also designed this way. As are regulators, some barrels etc...
manike