I don't see you having any problems jumping into this industry. With 25+ years of xp, this is like child's play to you by now. Best bet is to just look for a company and apply. If you want to increase your odds, release a couple demo reels (video games or clips) that use your music. It's a great way to express the mood of your music and how it influences game play. It's also a good idea to put some marketing effort into your demos too rather than just dry run through several games showing off your music. It's also a good idea to show that you have designer skills. Make a lot of effort to show that you carefully plan and design out your music. Write a little section on your site, or at least on your resume, how you work from start to finish. This will separate you from the dime a dozen musicians to one who knows how to play the game.
It's also a good idea to play a few games and know the industry. The worst thing you can do is apply to a video game company and tell the interviewer you don't play games. You may laugh at this, but I've seen it happen.