Our Team

Executive Team

President/Chief Executive Officer
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…
Executive Vice President/Chief Financial Officer
Regina Edwards is the Executive Vice President & Chief Financial Officer of Exponents, Inc. She has been with the organization for 23 years and oversees…
Executive Vice President/Chief Operating Officer
Samantha Lopez has been with EXPONENTS for over fifteen years first as Director of Development & Contracts then Director of Quality Assurance and Chief Administrative…


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.


Melissa Rios-Malave

Sr. Clinical Director of Drug Treatment

Wendy Jenerette

Sr. Director of Human Resources

Dona Pagan

Senior Director –ECPPD

Donald Powell

Sr. Directors of Programs and Development

Juan Jordan

Director, Recovery Support Services

Dana Diamond

Director of Health Services

Yvonne Soto

Director of Transitional & Vocational Services

Frank Perez

Director of Data Systems

Victor Velazquez

Director of Training

Viola Varner

Assistant Director of Drug Treatment

David Wilson

IT Manager

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