Reaching out to some of college coaches could help direct you to good training facilities who'll likely have a few good instructors. The volunteer AC's for the colleges will also run camps and teach at a local facility (typically below HS level to avoid NCAA conflicts), but they were likely good players where ever they attended college. I found a former Vandy SS this way who taught advance fielding techniques (gem of a find).
Also, if you sort through this link, you'll see the 2018 committments from Ohio listing the teams they play with. Contact a few of those teams that might be near you and ask about training facilities and instructors they might recommend.
https://www.fieldlevel.com/vie...ents/baseball/all/oh
My preference is contacting the college coaches...You can do this yourself, not your kid.