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Meet Our Staff

Dr. Pellack

Dr. David Pellack, PhD, LPC, CSAT – Clinical Director

Dr. Pellack earned his doctorate from Indiana University, Bloomington.  David’s dissertation focused on characteristics that predict patient program compliance for chronically homeless mentally ill individuals, many of whom had issues with drug and / or alcohol abuse.  While at IU, David did an extended practicum at the Kinsey Institute where he worked with clients with a variety of sexual issues and received training on numerous treatment modalities.  As a Kinsey intern, David also co-facilitated a weekly group for transgendered individuals.  David completed his internship at the Syracuse Veterans Administration hospital where he focused his training on traumatized veterans in hospice.  David has over 15 years of experience working with traumatized children and their families in foster care and psychiatric community residences.  He has been with the ECU since 2016, and was the assistant director for 5 years before becoming the director last year.

David recently became EMDR certified and incorporates this into the intense trauma work we do at KeyStone.

As director, David enjoys educating the public and professionals by providing trainings on addiction, trauma and sexual compulsivity.  David continues to utilize his skills (maintains contact with the clients) by having an “open door” policy with all the clients, facilitating a variety of groups and assisting clients with trauma through EMDR therapy.

Dr. Lesley Lee, M.D. – Medical Director

Dr. Lesley Lee, MD. has been appointed to Medical Director at KeyStone Center. Dr. Lee’s desire is to apply her skills and expertise in diagnosing, counseling, and providing support to patients who are going through emotional, intra- and interpersonal, and psychological struggles. She has received her M.D from Korea University Medical School and is Board Certified for Adults – Board Eligible in Children and Adolescent. Dr. Lee has been working in the behavioral health field for over 25 years, so she will be bringing with her substantial insight and knowledge to our facility. Prior to joining The Keystone Center, Dr. Lee has worked at several other UHS facilities.

Robyn Liebman, Psy.D. – Forensic Consultant

Dr. Robyn Liebman is a licensed psychologist in the states of Pennsylvania and New Jersey. She graduated in 2017 from Widener University’s PsyD program, with a focus on Forensic Psychology. Dr. Liebman completed her pre-doctoral internships at Clinical Neuropsychological Associates and Community Treatment Teams. Her focus throughout graduate school was on forensically involved populations with co-occurring diagnoses, such as substance use disorder, schizophrenia, depression and bipolar disorder. Her interests include cognitive and behavioral therapies for the treatment of substance abuse disorder, severe mental illness, personality disorders and forensic populations.

Dr. Liebman joined the Keystone Team in February 2020. Prior to working at Keystone, she worked in pharmaceutical research where she assisted in the completion of drug trials, assessing the effectiveness of medications to treat Schizophrenia, Depression, PTSD, Bipolar Disorder and Borderline Personality Disorder. Dr. Liebman completed her post-doctoral hours at Ancora Psychiatric Hospital in New Jersey. While working in the New Jersey state psychiatric system, Dr. Liebman was trained in Dialectical Behavioral Therapy (DBT) and was the lead psychologist in the women’s DBT program.

Dillon Reeves

Dillon Reeves is a licensed social worker with a Master’s Degree in social work from the University of Pennsylvania and member of the Systems-Centered Training and Research Institute.

Dillon has experience providing counseling and support to diverse individuals and families spanning a broad range of community settings to address a variety of health topics, including relationships, illness and disability, sexuality, gender identity, trauma, and mental health. Dillon’s integrative approach focuses on promoting holistic personal growth, development, and transformation by using effective strategies to increase insight into oneself and relationships.

Family Therapists:

Karen Martin

Karen Martin, MA, LMFT, CSAT, EMDR trained

Karen Martin, an MA in counseling from the University of Connecticut 1981, has been working with the KeyStone Center ECU for over 9 years. As the KeyStone’s Family Therapist, she works with adults, adolescents, dual diagnosis population and their family’s on a daily basis. Karen previously worked as the Program Coordinator for the IPR Program which treats co-occuring disorders. Karen’s training is in couples and family therapy with a special interest in trauma.



Nancy Roberts Willis, M.S.W., LSW, CP

Nancy Roberts Willis, M.S.W.,LSW, CP, is a licensed social worker in Pennsylvania and a certified practitioner in psychodrama by the American Board of Examiners in Psychodrama, Sociometry and Group Psychotherapy. She facilitates groups at KeyStone Center ECU for sexual addiction, KeyStone Center for alcohol, drug and gambling addiction, and at the Renfrew Center for eating disorders. Nancy also facilitates a weekly outpatient psychodrama group at OATS Counseling Services. She maintains a private psychotherapy practice and has a special interest in women’s issues, trauma, and couple and family healing.

Art Therapist:

Recovery Counselors:

Paul Greway

Paul Greway

Paul Greway has worked in the Addiction field for the past thirteen years and has been employed at ECU for the past eleven years. During his tenure here, Paul has acquired a great deal of knowledge and understanding which serve him well in introducing the program to potential referral sources and in supporting potential clients. Paul facilitates groups on offending behaviors, addiction and trauma, relapse prevention and education groups on the twelve steps of recovery and the recovery process.

Other Clinical Staff:

Cephus Richardson

Cephus Richardson

Cephus Richardson is an addiction counselor at the KeyStone Center ECU and is currently completing his MSHS. He is passionate about helping those in recovery and being a part of the KeyStone Center team. Cephus considers it a priority, and has a natural ability, to make meaningful connections with clients while furthering their recovery.

Robert Ryan, MSS, LCSW, MBA

Robert Ryan, MSS, LCSW, MBA is a licensed clinical social worker who graduated from the Bryn Mawr Graduate School of Social Work and Social Research. He also has a certificate in Cognitive Behavioral Therapy. Bob’s passion and expertise is in the connection between childhood trauma, the brain, and addiction, a topic he presents monthly to clients. He also facilitates the Sunday morning relapse prevention groups which focus on rationalizations, the Personal Craziness Index, the Three Circles of SAA, and High-Risk Factors. Bob brings a great deal of knowledge, understanding, and compassion to clients of the Keystone ECU program. When Bob is not at Keystone, he provides individual outpatient therapy services to disadvantaged individuals with mental illness at a local community health agency.

Marc Treanor

Marc Treanor, M.Ed., CAAP, ICGC-I, ASAT-Candidate

Marc Treanor has 15 years of experience working with addicts to find recovery from drugs, alcohol, and compulsive sexual behaviors. He was originally from NY, and he came to the area to get a bachelor’s degree from the University of Delaware. He then earned a master’s degree from Wilmington University and went on to teach high-risk students in a variety of settings for over 20 years. Since 2017, he has worked at the ECU as a recovery counselor and the intake coordinator. As the intake coordinator, he is committed to help those struggling with sex addiction find appropriate treatment, so they may have healthy relationships and fulfilling lives.​ Contact Marc here: [email protected]