Do some research
Before making a decision, you should do some research about the candidates. To make the best of your efforts, you should hire a person who has played at the professional or at least semi-professional level. The most effective method is to browse the internet and make a list of those players who started coaching after their retirement.
Consider the qualifications
Though experience is a vital thing, coaching also involves some technical aspects. That is why, certain certifications are essential for coaches. You should ask the candidates to provide you the required documents and references. Everyone, who knows the game, agrees that coaches with proper educational background can perform better than others.
Ask professional players
You may seek help from professional players who have been in the game longer than you. Make a list of the names they suggest and then conduct your own research.
Check track record
Next thing, you should do is check the track record of the shortlisted candidates. You may contact them and ask them to send their resume. Every professional coach maintains a record of his students. By reviewing that list, you will be able to judge the expertise of the coach.
Call for an interview
After shortlisting all the candidates you need to start conducting interviews. Do not feel hesitation in discussing anything that concerns you. Ask them about the expected salary and state clearly what you have to offer.
You should ask your shortlisted candidates for test classes to determine their coaching approach. If a coach is running a camp then visit his training sessions to gauge his potential. You can also seek feedback from other players under coaching before you make your final decision.