About Our Business

O'Brien Chamber Services was formed by Pat O'Brien. Pat has worked in the
HVACR field since 1986. He was factory trained by Thermotron and was a field
service engineer there for over 14 years. During his time at Thermotron he
covered Maryland, Washington D.C., Virginia, Delaware and southern
Pennsylvania. Pat has also been trained by Cincinnati Sub-Zero.

O'Brien Chamber Services is dedicated to providing the best service possible.
Service will be provided that meets or beats factory service. Response time is the
fastest in the industry.




































O'Brien Chamber Services, Inc is an independent service contractor. OCS is not affiliated with Thermotron, Espec,
Sun Electronics, TestEquity or CSZ.
O'Brien Chamber Services, Inc.
O'Brien Chamber Services

Phone: (410) 612-0994

Email:
pat@obriencsi.com
O'Brien Chamber Services, Inc., Air Conditioning Contractors & Systems, Joppa, MD