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is-pro is a Los Angeles, CA-based company in the Business Services sector.
Apollo Janitorial and Bldg Svc is a Steubenville, OH-based company in the Business Services sector.
Callaway Industrial Services is a Mooresville, NC-based company in the Business Services sector.
Lieber is a Chicago, IL-based company in the Business Services sector.
Since 1985, Telgian has served as a trusted partner to clients around the globe, providing innovative fire, security, life safety consulting and engineering/design services, keeping facilities safe, compliant and on budget. Headquartered in Phoenix, AZ with regional offices across the nation, Telgian provides service throughout the US and abroad. We offer our clients a comprehensive, single-source solution for all of their fire protection, security and life safety needs.