If your television didn't come with a wall mount, then you should only hire contractors with TV wall mounts in stock. The contractor will probably come out and take measurements of your TV in an attempt to match them with any mounts he or she has in stock.

Your contractor should have a reasonable amount of carpentry experience. Mounting an expensive television in a secure way requires a certain level of carpentry expertise that not all contractors may have. If necessary, ask the contractor for any references that he or she has from previous clients. This will help establish the work history and expertise of the contractor.

You should only hire contractors with insurance for a job like this. If you don't work with an insured contractor, then you may end up losing out financially should issues arise. It is always a good idea to work with insured contractors whenever it's possible.

Get an estimate for the job before the contractor starts. This is a relatively simple job, so the final cost should not be much different from the estimated cost.