Pye-Barker Fire & Safety acquires Communication Systems International (CSI)

By SSN Staff
Updated 9:55 AM CDT, Tue April 7, 2026
ATLANTA—Pye-Barker Fire & Safety has announced the acquisition of Communication Systems International dba CSI, enabling Pye-Barker to bring full-service code compliance and peace of mind to more customers throughout Texas.
Established in San Antonio, Texas, in 1996, CSI is a fully integrated and diversified security and communications company. CSI - led by co-owners Carl Lyssy, Roger Lyssy and Darryl Mosses - designs, installs, tests and maintains fire alarm and security systems. It also specializes in video surveillance and monitoring, access control and communication systems, integrating products into a single solution that meets customer needs and provides peace of mind for commercial, industrial and residential buildings.
"Selling this company required the perfect culture match, and Pye-Barker provides just that," said Carl Lyssy. "It's a relief to know we are now a part of a company with the national impact and resources needed to back our local mission. Together, we can continue to push innovation in fire and life safety to protect the communities we live in."
"The integration of CSI into our team presents an exciting opportunity," said Bart Proctor, CEO of Pye-Barker. "The addition not only adds to the capabilities of our comprehensive services in the San Antonio market, but most importantly this helps us protect more buildings, more people and more communities from the devastating impact of fire and life safety threats."
CSI's expert team and skilled technicians will continue to serve customers in Texas. Nelson Mullins Riley & Scarborough, LLP represented Pye-Barker in the transaction. CSI was represented by the Law Offices of Marc P. Katz, LLC and Tim Shiner with Sell Alarm Company.
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