Pye-Barker Acquires S.E.M. Security Systems of Warwick, New York

S.E.M. Security Systems acquisition further establishes Pye-Barker's security and fire alarm services in the Northeast.
Published: December 19, 2025

ATLANTA — Full-service fire protection, life safety and service service provider Pye-Barker Fire & Safety has acquired Warwick, N.Y.-based security systems and fire alarm provider S.E.M. Security Systems, according to a joint announcement.

This acquisition “further establishes Pye-Barker’s security and fire alarm services in the Northeast, elevating customer experience and comprehensive fire and life safety for heightened community impact,” the announcement says.

S.E.M. Security Systems provides security systems, intrusion detection, video surveillance, fire detection and fire alarm systems. Backed by 24-hour monitoring, S.E.M. Security installs, inspects, tests and maintains systems with an emphasis on safety and code compliance.

The company has more than 35 years of experience in the security field.

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Why Did Pye-Barker Acquire S.E.M. Security Systems?

What started as a career in fire protection expanded to the security sector when owner Stephen Mocarsky experienced a home break-in himself, sparking a new mission to protect others in his local community from similar incidents.

“As we join the team at Pye-Barker, we’re proud to be nationally backed, locally operated,” says Mocarsky in the joint announcement. “Protecting the businesses, families and property of our neighbors has always been our driving motivator. Knowing that we now have Pye-Barker’s resources to take our mission to the next level is deeply meaningful for our entire team.”

“S.E.M. Security Systems developed a strong reputation built on genuine care for saving lives and property,” says Bart Proctor, CEO of Pye-Barker, in the announcement. “Their impact on our Northeast services will be immeasurable, bringing long-standing expertise to the table coupled with passion for what we do best: protecting others.”

S.E.M. Security System’s technicians will continue to serve customers in the northeast United States.

Nelson Mullins Riley & Scarborough, LLP represented Pye-Barker in the transaction.

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