Six months is not nothing. But I agree. He will have a problem. I'm not sure whether he was charged as a sex offender or not. I do know that he was charged with a federal communications charge. Fortunately, he had a job with people who knew about the charges and worked on up until he went to jail. So he will have good references. But he will certainly face challenges.
The challenges make the man. I'm sorry I characterized him as damage (in the war on perverts). Nothing will be as easy now, but he seems to starting on the right note, volunteering to teach other inmates. I would expect him to succeed as long as he doesn't get bitter like his mom.