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Since 1997, Cornerstone Communications, Inc. has delivered superior phone system maintenance solutions to businesses of all sizes. By consistently providing excellent service to AT&T/Lucent/Avaya and Nortel product users, we have built a solid reputation of professionalism and reliability. Our dedicated team of experts share one common goal: to provide the finest personal service and customer support available in the telecom industry. Cornerstone Communications is your complete solution for telecom maintenance and monitoring of all AT&T/Lucent/Avaya and Nortel product lines. We are a full service telecom maintenance provider. We are NOT an insurance company. Cornerstone Communications offers a wide range of service options to both private businesses and government agencies. Our variety of telecom solutions include the Premium Protection, Partnership, Legacy and GSA Maintenance Programs as well as 24/7 Secure Watch Monitoring and Web Portal Ticketing Services; all backed by a 100% Satisfaction Guarantee. We take great pride in providing our clients an unsurpassed level of support. For over a decade Cornerstone Communications has raised the standard of service for the telecom maintenance industry. As we move forward, we will continue this tradition of excellence with a spirit of creativity and innovation that benefits the customers we proudly serve.

Cornerstone Communications, Inc Questions

The Cornerstone Communications, Inc annual revenue was $15 million in 2026.

Mark Stewart is the President of Cornerstone Communications, Inc.

5 people are employed at Cornerstone Communications, Inc.

Cornerstone Communications, Inc is based in Fenton, Missouri.

The NAICS codes for Cornerstone Communications, Inc are [51791, 51, 5179, 517].

The SIC codes for Cornerstone Communications, Inc are [489, 48].

Top Cornerstone Communications, Inc Employees

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