Colleen Madrigale, LSW

Colleen Madrigale, LSW is a Licensed Social Worker who has been with Community Services Group since 2016. She holds a Master’s of Social Work degree from Temple University. Colleen has completed Foundational Training in Dialectical Behavior Therapy (DBT). Colleen provides DBT treatment and outpatient therapy for adolescents and adults. Colleen’s previous professional experience at CSG includes Program Coordinator of the Specialized Transitional Supports for Adolescents (STSA) Program. Colleen has a special interest in working with LGBTQIA+ identifying individuals and transitional age individuals.

Brandon R. Pankiewicz, MSN, CRNP

Brandon R. Pankiewicz, MSN, CRNP is an ANCC board certified Psychiatric Nurse Practitioner who received his degree from Northeastern University. Prior to working at CSG, he worked as a registered nurse at McLean Hospital in Belmont, MA, and at Western Psychiatric Institute and Clinic of UPMC. Starting at CSG in 2020, Brandon specializes in psychiatric evaluations and continuing medication management, focusing on treatment of adults using an evidence-based psychopharmacological approach.  With his nursing background, he utilizes a patient-centered and collaborative approach to managing care, and feels the best outcomes are achieved by fostering therapeutic relationships and seeking ongoing input from the client’s perspective.

Rebecca L. DiSarro, MSW, LCSW

Rebecca L. DiSarro, MSW, LCSW, is a Licensed Clinical Social Worker who is providing school-based outpatient therapy for children, adolescents and families.  She completed her Master of Social Work degree from Marywood University.  Rebecca’s previous professional experience includes providing case management for a therapeutic foster care program; nephrology social work at a kidney dialysis center; and mobile therapy and behavioral specialist consultation in the home, school and community settings.

Danay Hershey, MSW, LSW

Danay Hershey, MSW, LSW, is a licensed social worker who has been with Community Services Group since 2018 providing school-based outpatient therapy for children and their families. Danay holds a Master’s of Social Work degree from Millersville University. Her previous professional work experience includes social worker for community-based agency, case manager for family resource and counseling agency, and school social worker.

Meghan Sensenig, MSW, LCSW

Meghan Sensenig, MSW, LCSW is a licensed social worker who obtained her Master of Social Work degree from Temple University. Meghan began employment at Community Services Group in November of 2017. Meghan provides school based outpatient services to children and adolescents. She also offers a DBT-Informed Group. Meghan has previous experience providing therapy and support in a Residential Treatment Facility for adolescent girls, as a medical social worker in a Health Care Organization and foster care and adoption services.

Alyssa Potkovac, MSW, JFIS

Alyssa Potkovac, MSW, JFIS provides individual and family therapy for children, teens and adults at Lancaster and Dauphin Outpatient Service locations. She holds a Master of Social Work degree from West Chester University. Alyssa is certified as a Juvenile Firesetting Intervention Specialist I and II. Alyssa has completed Foundational Training in Dialectical Behavior Therapy (DBT). Alyssa provides DBT treatment and outpatient therapy for adolescents at both the MAPS/Lancaster and Dauphin Outpatient locations and also provides DBT for adults at the MAPS/Lancaster location.   Alyssa began working at CSG in 2015, she provided community based services with Juvenile Firesetter Assessment Consultation Treatment Service (JFACTS). Previous experience includes working in a forensic setting providing group and individual therapy as well as community integration. Alyssa also has past experience providing therapy services within an Adolescent Partial Hospitalization Program.

Mike Brinkos, MSW, LSW

Mike Brinkos, MSW, LSW obtained his master’s degree in social work from Millersville University. Joining the outpatient team at Community Services Group in 2019, Mike is an outpatient therapist on our Dialectical Behavioral Therapy (DBT) team and works with both adolescents and adults. He also has training in Dialectical Behavior Therapy Prolonged Exposure (DBT-PE) for those who have completed Stage 1 of a DBT program. Mike’s previous experience in mental health includes services provided to dually diagnosed individuals (MH and IDD) in both inpatient and community settings. He also has experience as an adjunct faculty member at Millersville University. He is welcoming and affirming of people within the LGBTQ population who are seeking therapy.

John Perez, MA, LMFT

John Perez, MA, LMFT, is a licensed marriage and family therapist who received his MA from the Evangelical Theological Seminary. He has had training in Eye Movement Integration and trauma, and has provided therapy in the outpatient and school settings since 2011. Since joining CSG in 2019, he has provided individual and family therapy. He is bilingual in Spanish and English, and works with adults and children.

Angela Keller, MSW, LSW


Angela Keller, MSW, LSW, received her Master’s degree in social work from Millersville University. She has worked in the mental health field since 2003 providing case management and outpatient therapy services. She enjoys working with all age groups and utilizes a person centered therapeutic approach. She has participated in post-graduate specialized training in trauma-informed care and trauma-focused therapies, including Trauma-Focused Cognitive-Behavioral Therapy (TF-CBT). When working with children, Angela has experience in both child-centered and directive play therapy. She has been at CSG since 2018 and provides school based outpatient therapy services in the Pequea Valley School District. Most recently, Angela is excited to begin her expanded role at CSG as an outpatient clinician at CrossNet Ministries in New Holland.


Leanna Hassler, MA

Leanna Hassler, MA, is a Licensed Professional Counselor.  She graduated from Alvernia University with a Masters of the Arts degree in Clinical Counseling.  Leanna has been providing mental health services since 2017 in community mental health settings. Leanna joined Community Services Group in 2018 as an outpatient therapist. She’s currently in the  process of becoming certified in an evidenced-based treatment intervention called Parent-Child Interaction Therapy which focuses on improving parent-child relationships and decreasing disruptive behaviors. Leanna has experience working with families using an ecosystemic structural family therapy approach. Leanna works with all ages and mental health diagnoses but has a special interest in children, adolescents, and young adults. Upon request she can provide couples and family counseling. Leanna’s approach to therapy is client-centered and solution-focused, meaning that the client themselves is the expert and we work as a team to alleviate symptoms and improve quality of life.  Cognitive behavior therapy and mindfulness techniques are taught and incorporated into solutions for many of my clients.