I've been a church sound guy for about 18 years. I started with a church youth choir, and this grew into my job. I now work with a major systems contracting firm and also assist my church tech director as much as I can. Start with someone with a good heart for service, and then look for ways to educate him or her.
Young people are a good place to start looking.
Just letting people know what is expected can help - it doesn't take any talent to turn a mic on, on time. And it's usually the little things that make a big difference. Being both makes me better at both. I can talk to clients and know what they need, and I also design systems that are user friendly. EASE takes out the guesswork.