Our Team

Keystone Door & Building Supply is aligned with the finest manufacturers and distributors in the industry. This alignment, combined with a leadership team that was forged from the industry’s top talent, who together have over 100 years of experience working with residential and commercial doors, millwork, hardware, and windows. Our commitment is simple, “Create lasting relationships by providing services and solutions that exceed our customers’ expectations.”



Dale Winchester: Chairman of the Board of Directors

Dale has been in the manufacturing and installation of doors, millwork, and windows for over forty years. He spent 41 years at Sacramento A-1 Door, where he was an executive and shareholder. He held the responsibilities of Director of the board, Vice President, President & COO, and R.M.O. on the State Contractors’ License Board. Along with Dales history as a visionary leader at A-1 Door, he has been joined at Keystone Door & Building Supply with the additional leadership depth of Thaddeus Carpenter, Dave Herron, and many others.

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Thaddeus Carpenter: President

Thaddeus has 21 years of experience working in the residential & commercial door, millwork, hardware, and window industry. During his time with Sacramento A-1 Door and more recently with El & El Wood Products, he has gained a diverse collection of experiences, including assisting in the production process, Supervisor, Division Leader, and VP of Sales.

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David Herron: VP of Operations

David has 42 years of experience in manufacturing & plant management, where he delivered high-quality doors, millwork, and windows. He is a highly respected Plant Manager, who has successfully led production activities for Sacramento A-1 Door and most recently Heritage One Door in Sacramento.

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Craig Forsyth: VP of Sales

Craig has 33 years of experience working in the door, millwork, and window industry. He has held a variety of positions of leadership, first with A-1 Door and then more recently with Heritage One Door.

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