Our Team

Executive Team

Joseph R. Turner, J.D.
President/CEO
Joseph R. Turner, JD, is the co-founder and current President/CEO of EXPONENTS, Inc., in New York City. EXPONENTS is the first known harm reduction substance…
Regina Edwards
Executive Vice President/CFO
Regina Edwards is the Executive Vice President & Chief Financial Officer of Exponents, Inc. She has been with the organization for 23 years and oversees…
Samantha Lopez
Executive Vice President/COO
Samantha Lopez has been with EXPONENTS for over fifteen years first as Director of Development & Contracts then Director of Quality Assurance and Chief Administrative…

WE LOVE WHAT WE DO

As a collective, we make sure to work as hard as possible to produce high-quality results in a loving and supportive environment. We believe that a team is only as strong as its weakest link, and we are proud to say that everyone we work with is leaders in their own right.

Management

Viola Varner, LSMW, CASAC

Assistant Director of Drug Treatment

 Athena Thomas

Human Resource Coordinator 

 Tawana Rowser-Brown, PhD, MSW, Master-CASAC, CRPA, CARC

Director, Exponents Center for Personal & Professional Development

 Donald Powell, MhS

Senior Director of Programs and Development
Yvonne Soto, MBA, CASAC-T

Director of Special Projects

 Juan Jordan, CRPA

Director, Recovery Support Services

 Shayra Vega, CASAC

Assistant Director, Judith Loeb Chiara Recovery Center

 Dana Diamond, CASAC

Director of Health Services

Victor Velazquez, CASAC

Director of Trainings

 Dianco Holder, CASAC II, R.C.A. Trainer of Trainers, Recovery Coach

Assistant Director of Trainings

 Frank Perez

Director of Data Systems

 David Wilson

IT Manager

Alexandra Spinks

Individual Giving & Fundraising Manager

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