Finding a good quality arborist is going to be rather difficult due to the various service providers out there who are not willing to put the work in that is required to bring their skills to a serviceable level. As a result of the fact that this is the case, you should try to ascertain what qualities arborists need to have in order to make them worthy of you hiring them in the first place, and perhaps the biggest example of this can be seen in things like localized flora and fauna and the knowledge your arborist might have with regards to these kinds of things.
You see, a lot of arborists at this current point in time try to think of flora and fauna as a universal thing. Suffice it to say that you need someone who has a more localized skillset without a shadow of a doubt. After all, you are living in a very specific area of the world, and in order for your arborist Cedar park TX to give you the services that you need from them you need to be sure that they are familiar with the local flora and fauna and can treat them accordingly.
A generalized knowledge base is not going to help an arborist get very far in their career, and it usually comes from a lack of experience. Knowledge of local plants and the like is an indicator that your arborist knows what they are doing, thereby greatly minimizing the chance that they would make any mistakes along the way. You can conduct an interview with any arborist that you are thinking of hiring. This will help you parse the good ones from the bad.