Our Team

Meet Our Executive Leadership Team.

Peter Schorr

President & CEO

Founder and CEO Peter Schorr created Retreat Premier Addiction Treatment Centers as the premier drug and alcohol rehabilitation treatment center on the East Coast. With 30 years as both a clinician and the manager of health care facilities, Peter developed innovative programs to treat those suffering from the disease of addiction. His vision was to create rehab treatment centers in peaceful and serene settings for patients to heal, learn and prepare for lifelong sobriety.

Kenneth Kosza, MA

Chief Operating Officer

Ken Kosza, MA, BA, is the Chief Operating Officer for Retreat Behavioral Health. A longtime senior executive in the behavioral healthcare industry, Ken began his career as a mental health counselor, before quickly rising through the ranks at healthcare providers throughout the Northeast.

In 2009, Ken became a drug and alcohol counselor and eventually a site director for outpatient provider Rehab After Work. In this role, he quickly grew to assume leadership responsibilities as Executive Director for Rehab After Work and, subsequently, as Vice President of the organization’s parent company, Onward Behavioral Health.

In 2013, Ken was invited to join Retreat at Lancaster County, before being elevated to COO across the entire organization in 2015. In this capacity, he has been instrumental in the company’s 2019 relaunch as Retreat Behavioral Health, moving it toward its current community-centric provider model specializing in both substance abuse and mental health care.

Not only has Ken worked directly with patients throughout his career, but he is intricately familiar with the nuances of the behavioral healthcare arena and has successfully managed corporate operations for the past decade — including overseeing multimillion budgets, hundreds of employees, and dozens of treatment sites.

Ken received his Master of Arts in Psychology from La Salle University in Philadelphia in 2009. Prior to that, he received his Bachelor of Science in Psychology from Springfield College in 2005.


Chief Clinical Officer

Chrissy Gariano, MA, BA, is the Chief Clinical Officer at Retreat Behavioral Health. She is based at the company’s original, and largest, facility in Lancaster County, PA.

In this capacity, Chrissy oversees all clinical activities at Retreat’s inpatient and outpatient facilities in Pennsylvania and Florida. Her oversight reaches hundreds of staffers, from clinical therapists to medical and nursing practitioners.

Chrissy commands formidable experience treating mental health and substance abuse disorders. She began her career in 2000 as a counselor at the Malvern Institute, a treatment center in Pennsylvania. In the brief span of just eight years, she was promoted to the facility’s Executive Director, entrusted with complete oversight of its personnel and operations.

In 2011, Chrissy became a founding member of Retreat at Lancaster County. Most recently, she helped manage Retreat’s transition to a fully licensed behavioral health treatment provider, supervising the development of new mental health-oriented curriculum and treatment tracks for patients with a variety of cognitive disorders.

Chrissy received her Bachelor of Arts in Sociology from Bloomsburg University; and her Master of Arts in Counseling Psychology from Immaculata University, where she graduated Summa cum Laude with the highest academic honors.


Chief Marketing Officer

Tom has been with Retreat since its planning stages. He holds a Master’s Degree in Human Services (MHS) and is a Licensed Clinical Alcohol and Drug Counselor (LCADC). Tom began his career as an addictions counselor in New Jersey in 1993 and has worked in every facet of the addiction field. In 2001, he was asked to head up the planning efforts for the Criminal and Juvenile Justice Subcommittee of New Jersey Governor’s Council on Alcohol & Drug Abuse (GCADA). Tom has also served two terms as the President of the New Jersey Chapter of Employee Assistance Professionals Association (NJEAPA). Prior to entering the addiction field Tom spent many years as a member of several unions including CWA, UFCW, Teamsters, and ILGWU.

In his private life Tom enjoys spending time with his family including his dogs, riding his motorcycles and music.


Chief Administrative Officer

Scott Korogodsky serves as Retreat’s Chief Administrative Officer. He provides oversight and leadership to the financial and systems operations at the Retreat facilities. With a background in management of finance production and manufacturing of consumer goods, he made the transition to operations management in Behavioral Health almost a decade ago. Scott has been a member of the Retreat Team since the initial concept in the role of Director of Operations. A native of Chicago, Scott enjoys spending time with his family, riding his Harley and “strumming” his Martin guitars.

Dr. Joseph Troncale


Dr. Joseph Troncale, MD, FASAM, is a highly-respected leader in addiction medicine, with a career that has spanned academia, hospital systems, and treatment centers. A published author who has published multiple papers in addiction journals, Dr. Troncale was previously a member of staff at the Caron Foundation before joining Retreat Behavioral Health, served on the faculty of Jefferson Medical College, and has held roles with Lancaster General Hospital for the past two decades. Dr. Troncale earned his bachelor’s degree at the University of Alabama in 1974, and his medical doctorate from the University of South Alabama College of Medicine in 1979. He later joined the College’s faculty as an assistant Professor and Residency Program Director for Family Medicine. In 2010, Dr. Troncale was recognized for his extraordinary contributions to the field of addiction medicine, and a long and distinguished career, when Addiction Magazine named him their Outstanding Clinician of the year.

Dr. Letitia Covaci


Dr. Letitia Covaci, MD, is a Board Certified Adult Psychiatrist who has more than 20 years of experience in psychiatry and addiction medicine. A graduate of the University of Medicine and Pharmacy in Bucharest, Romania, Dr. Covaci holds membership in the American Psychiatric Association, American Medical Association, and the Geriatric American Psychiatric Association. After completing her residency at the Ohio State University Department of Psychiatry, Dr. Covaci went on to hold a number of senior psychiatry unit roles, including Medical Director of the Inpatient Psychiatric Unit at Lancaster General Hospital.

Melissa Callahan


Melissa is the Corporate Director of Nursing at Retreat Behavioral Health. In this capacity, she oversees a staff of several dozen nurses in both Pennsylvania and South Florida, and was instrumental in building Retreat’s medication-assisted treatment program since she joined the company in 2014. Melissa was educated at the University of Pennsylvania where she earned her Master’s degree and became a nurse practitioner, and has accrued significant leadership experience in her 20 years of practice both independently and with large healthcare providers. She has gone on to become a member of the American Nurses Association, American Society of Addiction Medicine, and American Academy of Addiction Psychiatry; and has been honored as a recipient of the Greater Philadelphia Healthcare Professional of the Year Award by Caron Treatment Center.