Meet Our Team

Elizabeth Conlin

PsyD, CEO

Beth has recently served as Chief Executive Officer for Friends Hospital. Beth worked for KeyStone Center as Director of Risk Management for 7 years, until she moved to the UHS COO training program. She served as Interim CEO at KeyStone Center, Horsham Clinic and was then promoted to CEO at Friends Hospital. During the last year at Friends Hospital, at Beth’s direction, Friends Hospital stayed ahead of the curve with regards to the COVID-19 pandemic. She helped the facility meet and exceed their business goals and worked to continuously strive to improve the patient experience and clinical programming. She started in healthcare in 1994 and has experience running the performance improvement, risk management, and compliance departments in behavioral health treatment facilities.

Beth earned her Doctorate in Clinical Psychology degree from Philadelphia College of Osteopathic Medicine (PCOM), in Philadelphia, Pennsylvania, as well as a Master’s degree in Clinical Psychology from PCOM. She received her Bachelor’s degree in Communication from The University of Rhode Island, where she attended college on a full athletic scholarship.

Throughout her longstanding career in healthcare, Beth has a proven record of expanding clinical programming, enhancing patient safety and mitigating risk as well as working alongside other leadership to improve patient satisfaction.

Dr. Lindsey Harvilla

MD, Medical Director

KeyStone Center welcomes Dr. Lindsey Harvilla as Medical Director.  Dr. Harvilla has provided intermittent psychiatric coverage here at KeyStone Center over the last year.  Dr. Harvilla received her medical degree from Edward Via College of Osteopathic Medicine and her undergraduate degree from The Pennsylvania State University.  Dr. Harvilla not only serves as a psychiatrist at Friends Hospital’s CRC but she is also a Chief Resident, in the school of psychiatry, at Drexel University College of Medicine.  She has numerous years of clinical experience and an expressed interest in addiction medicine.  Dr. Harvilla has many notable scholarly activities including many oral and poster presentations.

Andre Stewart

Psychiatric Nurse Practitioner

Andre Stewart, psychiatric nurse practitioner to the KeyStone Center treatment team , PMHNP received his BSN from Augusta State University, in Georgia and his MSN from Monmouth University in New Jersey. Andre has served 16 years on active duty in the US Army and 3 years in the US Army Reserves, with one year to go on his military commitment. He has served two tours of duty; one of which was in Afghanistan and the other in Iraqi. Andre has been an RN for 12 years and a PMHNP since 2021. He has worked in psych for over seven years. His work experience includes providing psychotherapy and medication management to a range of clients having mental health and substance abuse disorders, under the supervision of consulting psychiatrist. He is a team player, hard worker, very approachable with a focus on patient advocacy. He hails from Philadelphia and is a Sixers, Eagles and Phillies fan! He enjoys roller skating, bowling, horseback riding, football and watching movies.

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.

Al Coppola

Chief Financial Officer

Jennifer East

Director of Business Development

Jennifer has been with the KeyStone Center since 2001. She is responsible for all marketing efforts, including advertising and website management, as well as contracting and credentialing initiatives for KeyStone Center. Jennifer cultivates relationships with referring clinicians and oversees a team of outreach professionals who provide information about KeyStone Center’s programs and services to the addiction treatment community. Prior to arriving at KeyStone, Jennifer worked in the Managed Care industry in the Provider Relations and Contracting Department.

Michelle Westerfer

Director of Human Resources

Michelle earned her bachelor’s degree in Human Resource Management at Philadelphia University. She has worked in the Behavioral Health field for more than 25 years, most recently focusing on Human Resource Management. Prior to joining KeyStone Center, Michelle served as Director of Human Resources for Pennsylvania Clinical Schools.

Amanda Koniewicz

MA, LPC, CAADC, Director of Admissions

Amanda earned her master’s degree in Clinical Mental Health Counseling with a specialization in Addiction’s Studies and Therapeutic Practice from Immaculata University ( IU). Prior to coming to KeyStone Center, Amanda worked in the field of addictions and specialized in drug-free medication-assisted treatment (MAT). Currently Amanda is pursuing her doctorate degree from IU in clinical psychology where she is focusing her dissertation on MAT and the impact of clinical bias upon client treatment outcomes.

An Environment of Compassion
and Caring

KeyStone Center provides treatment for addiction and co-occurring issues at our facility five miles south of Philadelphia International Airport in Delaware County, Pennsylvania. We provide addiction services to patients from all over the country.

We offer no-cost, confidential assessments 24 hours a day, 7 days a week. If you or a loved one are struggling with addiction, call us today at 610-876-9000.

CALL 610-876-9000 TODAY.