Executive Leadership
William DiFabio Chief Operating Officer Mr. DiFabio has served in the position of Chief Operating Officer for Holcomb Behavioral Health Systems since 1995. Prior to that, Mr. DiFabio served on Holcomb’s Board of Directors from 1992-1995. During his career, Mr. DiFabio has held administrative positions for both profit and non-profit companies, including ten years at Mirmont Treatment Center, an affiliate of Riddle Memorial Hospital. Mr. DiFabio received his degree in business administration from Norwich University. He has served on numerous business, community and state boards.
Wendy Wait Chief Financial Officer Ms. Wait is Holcomb's Chief Financial Officer. She has 15 years experience in the public and private sectors and 6 years experience in nonprofit organizations. Prior to joining Holcomb, Ms. Wait was the Controller at Melmark Home Inc., which provides services to the MR population in several states. Ms. Wait has also held positions with Deloitte and Touche and the Wentworth Group. She attended Pennsylvania State University where she received a BS in Accounting with Honors and Distinction.
Roger W. Osmun, Ph.D. Chief Clinical Officer Dr. Osmun has been with Holcomb Behavioral Health Systems since 1996. He received his doctoral degree in clinical psychology from Temple University and completed his internship at Temple University Hospital. He is currently licensed as a Psychologist in Pennsylvania, Delaware and Maryland. Dr. Osmun is adjunct faculty in Immaculata University’s graduate psychology program. Dr. Osmun oversees the agency's predoctoral psychology internship program which attracts applicants from across the nation each year. Dr. Osmun is listed in the National Register of Health Services Providers in Psychology.
Susan H. Berryman, Esq. Chief Compliance Officer has been with Holcomb Behavioral Health Systems since 1992 through employment with one of its affiliates, and in 2010 assumed the position of Holcomb's Chief Compliance Officer. She received her B.A. degree from the College of William and Mary and her J.D. degree from Indiana University in Bloomington, Indiana. Ms. Berryman was Law Clerk to the late Chief Justice Nix of the Pennsylvania Supreme Court and to Judge (now Justice) Montemuro of the Pennsylvania Superior Court. She is licensed to practice law in Pennsylvania and Ohio and is a member of the Pennsylvania Bar Association Health Law Committee and the Chester County Arbitration Panel.
Robert R. Ruth Vice- President of Finance Mr. Ruth has served as Holcomb’s VicePresident of Finance since 1995. Mr. Ruth is a C.P.A. with over 42 years accounting experience in both the public and private sector. Prior to coming to Holcomb, Mr. Ruth was with Ernst and Young in Philadelphia.
The following managment staff are in alphabetical order:
Gerard Clark, L.S.W. is the Regional Director of Delaware and Philadelphia Counties for Holcomb Behavioral Health Systems. Most of Mr. Clark’s more than 22 year behavioral health career has been spent in acute care mental health settings. Mr. Clark has a B.S. from the University of Scranton and an M.S.W. from Temple University.
Richard Cossaboon is the Director of Information Technology for Holcomb. Mr. Cossaboon has been with Holcomb Behavioral Health Systems since February 2000. Initially he was the only one in the IT department but as the agency has grown so has Holcomb's IT Department. Rich now has a staff of 3 working with him. Prior to Holcomb, Rich has worked for a variety of IT and graphic arts companies.
Karen DiFabio has worked for Holcomb Behavioral Health Systems since 2000 in the capacity of Purchasing and Facilities Director. Mrs. DiFabio holds a B.A. in Business Administration from Immaculata University. She holds certifications from the National Safety Council Defensive Driving, the Commonwealth of PA National Incident Management System on Disaster Crisis Outreach and Referral Training , and the Red Cross Disaster Crisis Outreach and Referral.
Howard Isenberg, M.A. is the Executive Director of Open Door, Inc. in Delaware and Family Services Association in Maryland, both affiliates of Holcomb Behavioral Health Systems. Mr. Isenberg has a B.A. from San Diego State University and a M.A. in Counseling from National University in San Diego, CA. He has worked more than 26 years in the behavioral healthcare field.
Leslie Lipson, LCSW is Holcomb's Director of Crisis Services. Ms. Lipson is a Licensed Clinical Social Worker and has been with Holcomb since 1998. She received her Masters of Social Work from the University of Pennsylvania. Ms. Lipson has numerous years of experience in providing direct service as well as program development, clinical and administrative supervision. Ms. Lipson serves on numerous task forces and advisory boards that identify and address the behavioral healthcare needs of the Delaware County and Chester County communities.
John Markey, Psy.D. is Holcomb's Regional Director for Chester and Berks County services. Dr. Markey originally received a masters in Marriage and Family Therapy, with a concentration in Substance Abuse from Argosy University, Honolulu and later received his doctorate degree in Clinical Psychology from Argosy University, San Francisco. Dr. Markey completed his predoctoral internship at Holcomb Behavioral Health Systems in 2008. He has experience with direct service and administrative oversight of both substance abuse and mental health issues. Prior to assuming this position, Dr. Markey was the Clinical Manager of Open Door’s services in Delaware.
Beth Mingey is currently the Director of Prevention/Education Services in the Media Office. Ms. Mingey has spent over 20 years providing alcohol, tobacco and other drug prevention, education and intervention services in Delaware County and New Hampshire. Ms. Mingey has been a county and non-profit administrator for the last 4 years. She recieved her Bachelors degree from Ursinus College.
Patricia M. Poppert is Holcomb's Director of Developmental Disabilities across the agency. Ms. Poppert has extensive experience in the field of developmental disabilities in both the private and public sector. Ms. Poppert received her B.A. and M.S. from West Chester University and R.N. from Pottstown Memorial Medical Center.
Libby Stipcevich is the Director of Human Resources for Holcomb Behavioral Health Systems, a position she has held since 1995. Ms. Stipcevich has more than 25 years experience in the field of human resources, specializing in company health benefits and employee rights and responsibilities. She has attended West Chester University and is accredited by Villanova University in Professional Human Resources Management.
Elizabeth Warner is Holcomb's Director of Clinical Support Services. Ms. Warner began working for Holcomb in 1995. Ms. Warner's duties include overseeing the intake/referral process throughout the agency, performance improvement activities and quality assurance. She received her bachelor’s degree from the University of Delaware.
