Cornerstone Marketing Concepts, Inc. is a full service, award-winning sales and customer acquisition company. Our focus aims to establish relationships with our customers by providing exceptional sales and service.

Commercial Dealer of the Year





Cornerstone Marketing Concepts, also known as CMC Groups, is recognized as an industry frontrunner from the AT&T, leading telecommunications company in America.

CMC Groups works with top organizations and enterprises to deliver optimal solutions for commercial phone, internet, security, TV service and more. Backed by decades of industry experience, our innovative techniques and customer care combine to ensure client satisfaction.

We Provide Support

CMC’s internal support structure enables us to provide clients with superior customer and sales support. Each department works seamlessly together with a mission to grow and achieve unmatched sales results and satisfaction for our clients.

We Drive Results

We generate sales for industry giants that include Fortune 500 companies. Our national independent sales network executes customized face-to-face marketing and sales solutions servicing businesses everywhere to increase brand awareness and customer acquisition.

We Understand People

Our team of sales and customer service representatives are trained to develop personal and professional relationships with customers on behalf of our clients. We offer full-service, 360 support for all our customers based on their business needs.

We Work Together

At CMC, we work with a network of independently owned and operated sales companies, comprised of driven entrepreneurs with a proven track record for success. Our partners, combined with our customer solution experts, work to create innovative face-to-face programs and campaigns to drive results and deliver quality sales.

About Cornerstone

Headquartered in Southern California, CMC is led by CEO Ken Tang and VP of Sales Andy Tae. Our team is driven by the needs of our employees and clients, their growth and satisfaction as the benchmark of our success. Built on strong culture and values, we strive every day to be cornerstones for our families, businesses, clients, and partners.

CMC Team

Ken Tang


Andy Tae


Joanna Tang

HR Director/Founder

Paul Lim

Retention Manager

Jeff Bui

Escalation Manager

Lupe Franco

Verification Manager

Jean-Marc Touch

Business Development

Seth Tang

Installation Manager

Aisha Husain

HR Manager

Cornerstone Partners

Steven Heng


Peter Wang


Andre Parada


Moe Ullah


Giovanny Mendoza


Stephon Seales

Seales The Deal

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