Square One Team

Founder & CEO S. Barrett Rinzler has created, designed and managed more than 20 distinctive concepts in multiple locations throughout the Southwest, San Diego and Denver. Square One Concepts is led by a management team with combined 100-plus years of experience.  

Barrett Rinzler

President & CEO

Tracy Frazier

Chief Operating Officer

Chef Robert Wagner

Corporate Chef

Will Prichard

Director of Purchasing

Cheryl Buynak

Director of Human Resources

Amy Harvey

Human Resources Systems & Solutions Manager

Priscella Cabrera

Human Resources Manager-West Valley & Corporate Office

Michael Tremmell

Human Resources Generalist- East Valley

Tony Ishak

Corporate Trainer

Robin Thompson


Mandi Nilsen

Executive Assistant

Lindsay Ishak

Sales Manager

Chantel Gauthier

Office Assistant