Meet Our Team
Elizabeth Conlin, PsyD
Chief Executive Officer
Dr. Conlin joined KeyStone Center in January of 2021. Prior to that, she served as the CEO of Friends Hospital and interim CEO at Horsham Clinic. Beth started in healthcare in 1994 and has experience running the performance improvement, risk management and compliance departments in behavioral health treatment facilities. Throughout her longstanding career in healthcare, Beth has expanded clinical programming, enhanced patient safety and mitigated risk while working alongside other leadership to improve patient satisfaction.
Beth earned her Doctorate in Clinical Psychology from Philadelphia College of Osteopathic Medicine (PCOM) in Philadelphia, Pennsylvania. She has additional master’s degrees in clinical psychology and counseling. She received her Bachelor’s degree in Communication from The University of Rhode Island, where she attended college on a full athletic scholarship.
Dr. David Pellack, PhD, LPC, CSAT, EMDR trained
Clinical Director since 2021
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 transgender 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 in 2021. David became EMDR trained and incorporates this into the intense trauma work done 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 clinical skills by having an “open door” policy with the clients, facilitating a variety of psychotherapy groups and assisting clients with trauma through EMDR therapy.
Al Coppola
Chief Financial Officer
Al brings more than 41 years of experience in accounting and finance, with nearly 14 years of service at Keystone. He holds a dual master’s degree in Accounting and Finance from St. Joseph’s University and is a Pennsylvania Certified Public Accountant (inactive). Throughout his career, Al has provided steady financial leadership grounded in deep expertise, institutional knowledge, and a long-standing commitment to operational excellence.
Cari Pelc, MA
Director of Admissions
Cari joined UHS in 2006 and served in several healthcare roles, including a therapist with the Pennsylvania Clinical Schools and Utilization Reviewer at Horsham Clinic, before transferring to KeyStone Center in 2011 as a Utilization Review Coordinator. Cari worked to continually improve that department and was promoted to Director of Utilization Review in 2015. Cari also stepped in as the Risk Manager and Admissions Director, assisting the departments when support was needed. After spending some time in the Admissions Department, she decided to officially accept the Admissions Director position in September of 2023. She continues to focus on creating a good work environment and making the admissions process effective and organized. She wants every client to feel welcome as soon as they arrive at the KeyStone Center and to ensure that the best care is provided to each and every patient. Cari received her Master’s degree in Psychology Counseling from Immaculata University and her Bachelor’s degree in Criminal Justice from West Chester University.
Amanda Lafferty, LPN
Director of Utilization Review
Amanda started her career at the KeyStone Center in 2009 as a floor nurse right out of nursing school. Prior to working at KeyStone, she attended Neumann University and later graduated from Delaware County Technical School of Nursing in July of 2009. While working in the nursing department, Amanda assisted the Director of Nursing with training new staff nurses, performing chart audits and providing direct patient care. In August of 2014, Amanda transferred to the utilization review department as the Utilization Review Coordinator and later was promoted to Director. She is a reliable team player and extremely knowledgeable about the UR process.
Candis Breen, MA, LPC, ATR-BC
Director of Quality Assurance and Programming
Candis received her Master’s degree in Art Therapy from New York University in New York City, NY. She is Nationally Board Certified in Art Therapy and a Licensed Professional Counselor in Pennsylvania. Candis joined UHS in 2014 and then moved over to Keystone Center in 2015 where she was an instrumental part in implementing and maintaining the Dialectical Behavioral Treatment (DBT) track. In 2021, she transitioned into Quality Assurance and Risk Management at Keystone Center. In 2022, she spent a year at Fairmount BHS, further expanding her skills in the quality role before returning to Keystone Center again in 2023.
Jeff Grazier, MHS-C, MBA
Director of Clinical Services
Jeff entered the human services field in 1997 and worked in various capacities at several agencies before arriving at the Keystone Center in 2005. Jeff has held several positions at Keystone: Counselor-Aide, Phase 3 Counselor, Weekend Charge Clinician, Clinical Supervisor and Clinical Manager. Jeff obtained his Undergraduate degree in Human Services, Master’s degree in Human Services with a specialty in Counseling, and Master’s degree in Business Administration all from Lincoln University in PA. Jeff has been involved in the American Cancer Society Making Strides Event for the past fourteen years as a Team Captain.
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.
Laynette Walker, LPN
Director of Risk Management
Laynette began her career with the Dual Diagnosis population in 2000 as a Short Term/ Detox Counselor. She graduated from Delaware County Technical School of Nursing in 2007 and joined Keystone Center in October of that year as a full time Licensed Practical Nurse. After spending many years as a floor nurse, she was named charge nurse, then nurse manager, and then Interim Director of Nursing. Laynette’s passion for patient care, patient safety, other nurses, staff and this population have made her transition to the role of Director of Risk Management seamless.
Lindsey Harvilla, DO
Medical Director
Dr. Lindsey Harvilla has served as Keystone Center’s Medical Director since August of 2022. Dr. Harvilla received her Medical Degree from Edward Via College of Osteopathic Medicine in Spartanburg, SC and her undergraduate degree in Biology from The Pennsylvania State University. She completed her residency training at Hahnemann Hospital/Drexel University College of Medicine in General Adult Psychiatry where she served as Chief Resident during her final year. In addition to her work at Keystone Center, Dr. Harvilla works as an attending psychiatrist at Friends Hospital’s Crisis Response Center in Northeast Philadelphia. She is an Assistant Professor in the Department of Psychiatry for Drexel University College of Medicine and actively teaches psychiatric residents in both didactic and clinical settings. She has more than 10 years of clinical experience and is board certified by the American Board of Psychiatry and Neurology (ABPN). Dr. Harvilla has many notable scholarly activities including educating medical students, supervising psychiatric residents and numerous oral/poster presentations that were exhibited most recently at the American Psychiatric Association Annual Meeting. Dr. Harvilla strives to promote compassionate, comprehensive evidence-based care and challenge cultural misunderstanding/stigma surrounding addiction medicine.
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 30 years, focusing on human resource management. Michelle has been the Human Resources Director with Keystone since 2011. Prior to joining KeyStone Center, Michelle served as Director of Human Resources for Pennsylvania Clinical Schools
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.
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.