Steve Tucker

President & Chief Executive Officer

Entrepreneur, developer, businessman, philanthropist, and inspirational leader; Steve is the visionary behind of Unified Materials Group of Companies, the parent company of North American Stone Company, Shiloh Ridge Stone Products and North American Masonry Supply which he also founded. Steve has pervasive experience in manufacturing, construction and construction management, product invention and innovation. Steve has spent his career immersed in various aspects of the commercial and residential construction industry as a building product innovator and manufacturer, architectural designer and consultant to the industry. As a supply-side expert, Steve has developed “just in time” solutions for many of his clients in the fast-paced volume builder market that has resulted in long term relationships with some of the most prominent corporate home builders in Texas. Steve is also the Founder and CEO of Adelphoi Labs, Inc. Steve serves as the Co-founder and Board of Directors Co-Chair for the WERX in McKinney and the Board of Directors for Lake Lavon Baptist Encampment. Steve currently resides in the McKinney, Texas area with his wife of 32 years.

Rob Trotter

Chief Operating Officer

Rob previously served as Senior Vice President and Chief Information Officer for Brinks Incorporated where he was responsible for North America’s enterprise-wide strategy and technology initiatives. Before joining Brinks he was Senior Vice President / CIO for ADT Security where he was responsible for developing the technology strategy and optimizing operational efficiencies.  Rob’s career spans multiple industries where he’s had increasing roles of responsibility and leadership in technology, operations and strategic initiatives. Rob is a graduate of The University of North Texas where he specialized in Business and Information Technology.

Pedro Delgado

Vice President of Sales

Pedro has been heavily involved in the Architectural Cast Stone industry for over 25 years. Mr. Delgado served as a Plant Manager, Key Account Manager and Large Custom Sales and Project Management. He maintains a signicant client base and is a recognized architectural stone expert throughout the North Texas area. In addition to stone products, Pedro has managed many construction and masonry installation projects. Pedro lives in McKinney with his wife of 28 years.

Theresa Tucker

Vice President - Controller and Human Resources

Theresa spent much of her career as a Human Resource specialist. She served as an HR generalist for a national real estate firm as well as directing HR for the UMG companies.  She has managed employee relations, payroll, recruiting, insurance benefits including annual enrollment, workers compensation, HR processes and policies for 200 employees. Theresa also assisted with the real estate contracts, terms, acquisition of properties and hiring of employees for acquired properties.  Presently, she provides support to the operation with daily oversight of treasury as the company controller along with employee support, payroll, performance management, and recruiting.  Theresa comes from a family of stone makers and is married to Steve, founder of the UMG companies. Theresa has enjoyed serving her community as PTO President, Volunteer Coordinator, and fundraising for various programs.  She served on the McKinney ISD rezoning committee, working with representatives from city government, for expansion of the district and appropriate re-zoning. Charities include Clothe-a-Child, Hope Park, Samaritan Inn Food Pantry, Girls in Action youth camp and a Sunday School teacher.

256 Private Road 8571

Winnsboro, TX 75494


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