Obviously, a coaches past body of work is a very important data point when considering a hire. BUT, any hire on any job, is for the job you believe the person will do for you going forward, not the job they did for someone else. I have hired people with impeccable credentials and experience who did not work out and conversely took gambles on people who did not appear to be qualified that worked out great. Both are generally speaking exceptions for sure but both have happened. There is a human element that has to be applied to the decision. Hiring is not a formulaic exercise.