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.  

S. Barrett Rinzler

President & CEO

Tracy Frazier

Chief Operations Officer

Chef Robert Wagner

Corporate Chef

Roland Wood III

Chief Financial Officer

Will Prichard

Director of Purchasing

Howard Ginsberg

Chief Marketing Strategist

Tony Ishak

Corporate Trainer

Maria Vertes

Director of Human Resources

Priscella Cabrera

Human Resources Manager / West Valley & Corporate Office

Annette Ringgold

HR Generalist / East Valley

Nick Mastrodonato

HR Payroll Specialist

Lindsay Ishak

Group Sales & Catering Manager

Suzette Tarantini

Sales Manager

Sherene Robinson

Accounting Manager

Caeleigh Ahrens

Office Assistant

Mandi Nilsen

Executive Assistant

Skip to content