What is a appropriate and rational Pittsburgh tree running company? I have some trees that are getting too close to my house...

I have some trees that are getting too close to my house and some near dead limb. I wanted to see if anybody can recommend any obedient and reasonable tree looking after companies in the Pittsburgh nouns.
Will they come subsidise?
Answers:    The best type of company to hire would be any company that is ISA certified (International Society of Arboriculture). These companies that are certified step through yearly training sessions, and are up to date next to the latest technique and care to our trees.

Good luck.