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Marworth staff

Every employee at Marworth is dedicated to helping you or your loved one choose the road to recovery from addiction and stay on course. The Marworth team includes physicians, nurses, counselors, admissions staff, social workers, administrators, community relations representatives, environmental and food service workers, maintenance personnel, fellows and interns, and more.

The credentials of Marworth's staff demonstrate our commitment to providing compassionate care in a structured alcohol and chemical dependency program. Highlights of our professional team include:

  • A medical director, board-certified in addiction medicine
  • An admissions director who is a masters-level social worker with extensive experience in addiction treatment
  • Psychiatric consultations conducted by Margaret Jarvis, MD, board-certified in psychiatry, addiction psychiatry, and addiction medicine
  • Social workers experienced in the alcohol/chemical dependency field
  • Counselors certified in addiction treatment
  • Primary counselors trained specifically in treating healthcare professionals and uniformed professionals
  • Nurses certified in addiction nursing
  • Certified recreation therapy specialists


Dominic Vangarelli, CADC, ICADC, Vice President
Fax: 570-563-2711
Master of Psychology: University of Hartford
Joined Marworth: January 1994

Margaret Jarvis, MD, Chief
Division of Addiction Medicine
Department of Psychiatry, Neurosciences Institute
Specialty: Psychiatry
Undergraduate: Sweet Briar College
Medical school: Medical College of Virginia
Internship, residency & fellowship: Medical College of Virginia
Board certifications: Psychiatry, addiction psychiatry, addiction medicine
Joined Marworth: February 1999

Robert Friedman, MD, Medical Director
Medical School: Far Eastern University Institute of Medicine
Residency: Maimonides Medical Center
Board certification: Addiction medicine
Joined Marworth: July 2015

Olapeju Simoyan, MD, Associate Medical Director
Medical School: Pennsylvania State University College of Medicine
Residency: Penn State/Good Samaritan Hospital
Board certifications: Family medicine, addiction medicine
Joined Marworth: July 2014, promoted to associate medical director in 2018

Maria Kolcharno, MSW, LSW, Director of Admissions
800-442-7722 ext. 316
Fax: 570-563-3761
Master of Social Work: Marywood University
Joined Marworth: March 1992

Michele Davis, MS, CACD, LPC, Director of Counseling
Master of Rehabilitation Counseling: University of Scranton
Joined Marworth: April 1995

William Poray, LCSW, CAC, Director, Outpatient Programs
Master of Social Work: Marywood University
Joined Marworth: June 2001

Nicole Zmuda, LCSW, S-PSB, Counseling Manager
Master of Social Work: Marywood University, 2008
Master of Education in Human Sexuality: Widener University, 2017
Joined Marworth: 2008, promoted to counseling manager in 2016.

Call Marworth at 800-442-7722 or email to speak with an admissions counselor. You can enroll in an addiction rehab program yourself or refer someone else for treatment. Many individuals are referred to Marworth by a family member, family doctor, therapist, employer, employee assistance program, insurance provider, clergy, community organization, or another drug and alcohol rehab center.