We are accepting New Jersey clients for telehealth as approved by Gov. Murphy

The team

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Tracy E. Hill, Ph.D. | Director

Together with a staff of committed professionals, Center Street Center offers decades of combined professional, credentialed and licensed experience.


Tracy has more than twenty years experience in clinical, counseling and educational psychology. She received her Doctorate from Temple University in Educational Psychology, Master's from West Chester University in Counseling Psychology and her Bachelor's in Psychology from George Washington University.

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Ms. Kara Diefenderfer, M.S. | Clinician

Kara specializes in substance abuse mental health counseling. With more than ten years in the field, she offers individual, family and group counseling along with drug and alcohol assessments and testing.


Kara has a Bachelor's from DeSales University in Clinical Psychology and a Master's from Chestnut Hill College in Clinical and Counseling Psychology. By springtime, Kara will be a Licensed Professional Counselor and have earned her certifications in CAADC and EMDR.

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Madeline Maysonet, Psy.D. | Licensed Psychologist

Madeline concentrates on providing psychological and neuropsych testing for individuals. She continues to serve as a Lieutenant Commander in the U.S. military and as acting Chief Psychologist posted in New Jersey.


Madeline earned her PsyD and Master's degrees in clinical psychology from Carlos Albizu University in Puerto Rico as well as her Post Master's certificate in clinical psychopharmacology from Alliant Int'l University in California.

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Ms. Nancy Velazquez, LCSW/MAC | Clinician

Nancy has extensive experience in the mental health field as a bilingual Licensed Social Worker and Master Addiction Counselor in the Lehigh Valley. Nancy takes a wholistic and multicultural perspective working with clients. 


Nancy graduated from City College of New York with a Bachelor of Arts in Psychology and Hunter College School of Social Work for her Master's degree. Ms. Valezquez also has a Certificate in Aging from Boston University.

Join our team

If you'd like to join our team, contact the Director at thill@centerstreetcenter.com.

We offer the best competitive rates, beautiful office space and a fun place to work in a professional, ethical and diverse environment. Bienvenidos!

539 Center Street, Bethlehem, PA, USA

More information

Provide an email address and we'll send you or your loved one a pdf version of our brochure.