Below, are some links to searches that should be an aid to both you and he. He could also use a local temp agency to help him to find employment. Might not get exactly the job that he would want, but some good reputation does need to be built. It would be important that he be "straight up" about his conviction to any potential employer in an interview as to what he did, how sorry he is and what he has learned in positive ways because of the help that he has gotten since committing the offense.
Also, if it asks on any job applications about former convictions of any kind, then he needs to be completely honest on them. I have also never seen it on a job application where the applicant couldn't attach an additional document concerning any crime(s) that he or she has committed and also explaining the same way as I have already mentioned in my first paragraph above when having an interview.
Cook Wanted Seattle, Washington - Google Search
Seattle, Washington Cooking Jobs - Google Search
Help Wanted Seattle, Washington - Google Search
Seattle, Washington Online Classifieds, Jobs, Cooking - Google Search
Seattle, Washington Newspapers - Google Search
Seattle, Washington Newspapers Classifieds - Google Search
Seattle, Washington Jobs - Google Search
Seattle, Washington Employment - Google Search
Seattle, Washington Job Service - Google Search