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Addiction Specialists

  • Nature and goals of the treatment, rules and responsibilities, and requirements for admission and completion of treatment
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William J Heran, Ph.D., LCSW
Chief Executive Officer, Providence Treatment

William Heran, Ph.D., LCSW is the co-founder and Chief Executive Officer of Providence Treatment. Dr. Heran holds a Ph.D. from Smith College and a Master in Social Work from New York University and has over 28 years as a clinician, researcher, author, educator, spiritual advisor and program developer. He worked as a research associate with Bessel van der Kolk, M.D. at the Boston Trauma Center and published research on the traumatic effects of awareness during surgery. He has worked in many multi-cultural settings including Jamaica, Hawaii, New York City and Boston. He is a former Jesuit and continues to integrate spirituality into his work and programming at Providence Treatment. He has worked with professionals for many years and serves as an evaluator for State Boards of MedicinePharmacy and Nursing. He also is HIMS trained and treats private and commercial pilots. Dr. Heran has a particular interest and skill to work with clergy from all faiths with a substance use disorder. Dr. Heran’s skill and leadership makes Providence Treatment a leader in healthcare and treatment. He is also the founder of Main Line Recovery in Haverford, PA. For more information, please visit

Gabe Lau, MS, PE
Chief Operating Officer, Providence Treatment

Mr. Gabe Lau is the co-founder and Chief Operating Officer of Providence Treatment Companies and he has overall responsibilities for the operation and management of Providence Treatment, Sober Living Program, and Caduceus Academy for medical students. Gabe holds both Bachelor and Master degrees in Civil Engineering from Iowa State University and he is a licensed professional engineer with over 15 years of experiences in program and project management in various industrial and manufacturing businesses, commercial and healthcare buildings, fossil and nuclear power plants. Gabe has worked for 2 world-renowned US-owned engineering and construction companies prior to joining Providence Treatment team in 2014.  Currently, Gabe is pursuing his Doctorate of Philosophy (Ph.D.) in Organizational Development (OD) at Cabrini University in Philadelphia and is on track to earn his Ph.D. degree in May 2019.

Jane Martin, MS
Chief Technology Officer, Providence Treatment

Ms. Jane Martin holds a Master of Science degree in Computer Science from James Madison University.  She has had over 15 years of experience developing and managing technical systems for businesses with a special focus on solutions related to CRM, marketing technology, and analytics.  Currently, Jane is pursuing her Doctorate of Philosophy (Ph.D.) in Organizational Development (OD) at Cabrini University in Philadelphia and is on track to complete her Ph.D. degree in May 2019.


David Steinman, MD
David Steinman, MD, DFAPA
Psychiatrist Consultant

Dr. David Steinman is a Board Certified Psychiatrist who graduated from The Medical College of Pennsylvania.  He completed an internship in Pediatrics at St. Christopher’s Hospital for Children-Temple University Hospital, and served his Residency in Psychiatry at the University of Pennsylvania Medical Center.  He also received post-graduate training at the Philadelphia Psychoanalytic Institute.  He is a Clinical Assistant Professor in the Department of Psychiatry at the Perelman School of Medicine at the University of Pennsylvania.  Dr. Steinman performs medication consultation and follows up for a variety of disorders.  He has extensive experience with depression and anxiety disorders, bipolar disorder, adjustment reactions, eating disorders, and attention deficit disorder (ADD), adolescent issues, and impairment in professionals, particularly physicians.

Jason Hartman, DO
Physician Consultant

Dr. Jason Hartman graduated from the Philadelphia College of Osteopathic Medicine (PCOM). He completed his internship in the Department of Family Medicine at Crozer Hospital and then completed a residency in Neuromusculoskeletal Medicine (NMM) and Osteopathic Manipulative Medicine (OMM).  He is certified in advanced  forms of Osteopathic Medicine including multiple courses in  Osteopathy in the Cranial Field and Biodynamic Osteopathy, as taught by James Jealous, D.O. Dr. Hartman uses a multidisciplinary approach to patient care and wellness with a mission to share his passion for the quest for wellness with his patients, friends, and family.  Some of the modalities he uses include Osteopathic Manipulation, Prolotherapy, Medical Acupuncture, and Russian Kettlebell training.

Kendrick Peer Mugnier, PsyD, LPC
Clinical Supervisor, Providence Treatment
Dr. Kendrick “Peer” Mugnier recently completed a Doctorate in Clinical Psychology from the APA accredited Philadelphia College of Osteopathic Medicine (PCOM).  He is a Licensed Professional Counselor (LPC) who is currently working on post-doctoral hours for licensure as a clinical psychologist.  He has over ten years of experience working with clients who have co-occurring mental health and substance use concerns.  Peer uses evidence-based practices to address the needs of his clients as his training is in Cognitive Behavioral Therapy (CBT).  CBT is a structured and effective method for treating a wide range of clinical concerns from serious mental illnesses like Schizophrenia to adjustment problems, insomnia, chronic pain, and many other common issues.  Peer has experience and training in two specific forms of CBT, Dialectical Behavioral Therapy (DBT) and Acceptance and Commitment Therapy (ACT), that add a particular depth to his practice as they both include a strong emphasis on mindfulness practices.  Peer’s approach focuses on establishing genuine, warm, and supportive relationships with his clients while also challenging them to grow to their true potential.
Janet A. Castellini, MSS, LCSW, LCADC, NCPsyA
Psychoanalyst and Addictions Counselor, Providence Treatment

Ms. Janet Castellini is our addictions counselor and psychoanalyst who specializes in working with problems related to trauma, addictions, anxiety, depression, anger, and persistent problems in relating to others, utilizing modern psychoanalysis, also called resistance analysis. Janet has particular experiences in working with partners/families of combat veterans and people in early recovery. Janet received her Master of Social Service from Bryn Mawr College and is licensed as clinical social worker in the State of PA and NJ and certified modern psychoanalyst from Philadelphia School of Psychoanalysis.

Rachel Diamond, MSS, LSW
Addictions Counselor, Providence Treatment

Ms. Rachel Diamond received her Master’s Degree in Social Services from Bryn Mawr College after completing her undergraduate education in Social Work at Rutgers University. Using a strengths-based perspective, accountability, and narrative approaches, she incorporates these therapeutic techniques into psychodynamic therapy with individuals, groups, and families. Rachel has extensive experience and knowledge about the processes of early recovery and maintainence of recovery, including use of self-care, spirituality, and relapse-prevention. She is trained in Seeking Safety, a trauma-informed therapy tretament addressing issues which can arise when recovering from PTSD along with substance use disorders. This includes providing recovery tools to help strengthen healthy communication, advocating for self, and healing from codependency.

Lisa Oddo Dunn, MS, CAADC
Addictions Counselor, Providence Treatment

Ms. Lisa Dunn received her Master in Addiction Counseling credential through NAADAC following the completion of her Masters of Science degree in Psychology.  She obtained a certification of advanced studies in addiction counseling from Syracuse University. She is a certified advanced alcohol and drug counselor through the Pennsylvania Certification Board. In addition, she has established competency in gambling addiction. Over the last eight years, Lisa has gained experience in several different capacities working with a variety of challenging populations. These populations have often included those diagnosed with co-occurring disorders. In addition, she has experience working in many different demanding settings, from correctional institutes to adult day program.  Lisa’s therapeutic approach focuses highly on clients’ ambivalence and self motivation, as well as a sensitivity to trauma informed care. She often utilizes a combination of self awareness, humor, and accountability in order to provide the client with the best chances at success in treatment.

Tom Sexton, BA, CADC
Psychodramatist and Addictions Counselor, Providence Treatment

Mr. Tom Sexton is an experienced lecturer, educator, group leader and motivational speaker in the areas of relationships, families, addictions, preventive healthcare, parenting, spirituality and meditation.  He attended St. Joseph’s University and received his B.A. from Neumann University.  He has an Associate Director’s degree from the Horsham Psychiatric Clinic and the Moreno Institute of Psychodrama, Sociomentry and Group Psychotherapy.  He served as a consultant to the Horsham Psychiatric Clinic on Addictions, Family Counseling and Interventions and was an original member of the Problem Solving Theatre Group.  He has been in the professional counseling field for over 49 years and is recognized for his ability to communicate modern psychological concepts in a unique and dramatic style that make them understandable, inspirational and entertaining.  He teaches individuals, families and audiences how to release pent-up potential by changing old habits, beliefs and attitudes that inhibit and often block performance and full expression of the creative self.

Fiona Purcell, BS
Counselor Assistant, Providence Treatment

Ms. Fiona Purcell is our counselor assistant at Providence Treatment. Fiona holds a Bachelor of Science degree in Communications/Journalism from Ithaca College. She also has a Proficiency Certificate in Recovery and Transformation and an Addiction Studies Certificate from Community College of Philadelphia where she was inducted into the Rho Epsilon Chapter of the Phi Theta Kappa Honor Society. Fiona was born overseas and has traveled extensively. She helps to facilitate group sessions concentrating on 12-Step facilitation and the exploration of spirituality. Herself in recovery, Fiona connects with the patients on an empathetic level given her own experience and growth. Currently, Fiona is pursuing her Master of Science degree in Clinical and Counseling Psychology at Chestnut Hill College in Philadelphia.

Michael Keane
Licensed Acupuncturist, Providence Treatment

Mr. Michael Keane completed his acupuncture master’s training and Chinese herbal medicine certification at the Won Institute of Graduate Studies in Glenside, PA.  He seeks to bring together modern and traditional views on health, medicine, and healing practices in the search for a more robust human medicine.  He is passionate about working with people with pain, addiction, trauma, and internal medicine issues.  For his own health and enjoyment, he can be found playing guitar or painting in his free time.