Professional Leadership


Combined, Gaudenzia's executive leadership team has more than 200 years of experience in their respective fields of study and practice. We are proud to attract some of the best and brightest in the field to help us fulfill our mission of helping individuals with substance abuse problems. 


Mike Harle Headshot 

Michael B. Harle, MHS

President / Chief Executive Officer, Gaudenzia, Inc.

Michael Harle is the President / CEO of Gaudenzia, Inc. Mr. Harle began his career in 1973 as a chemical dependency counselor, and shortly after, developed drug and alcohol treatment programs in three state correctional institutions in Pennsylvania.  He received his Master's Degree in Human Services from Lincoln University in 1978 and holds a certificate in Non-Profit Management from Harvard University Business School. For a full biography, please click here.


Aronson Headshot

Gadi Aronson, MSW

Director of Development

Gadi Aronson has been with Gaudenzia since 2004 and has more than 25 years experience in fundraising. Mr. Aronson is responsible for all aspects of fundraising and public relations for the organization. 


Michael Coyle

Michael Coyle, MBA, CPA

Director of Finance & Accounting

Michael Coyle has been with Gaudenzia since 2011 and has over 20 years of executive financial experience, specializing in healthcare and non-profit organizations. He directs all aspects of Gaudenzia's financial operations. 


Ken Dickinson Headshot

Ken Dickinson, MS, RHP

Director of Marketing

Ken Dickinson has been with Gaudenzia since 2007 and is responsible for all aspects of recruiting clients to our programs. Mr. Dickinson is a registered pharmacist. He enjoys a national reputation as a lecturer and advocate in the areas of addiction and behavioral health. He is a Trainer for the Institute for Research, Education, and Training in Addictions (IRETA) as well as the North Eastern Addiction Technology Transfer Center (NEATTC).


John DiLeonardo, Esq.

John G. DiLeonardo, Esquire

John DiLeonardo is the Director of Governance & Compliance and performs in-house legal services for Gaudenzia. He holds a Bachelor of Arts in Political Science from Washington & Jefferson College (1976) and Juris Doctor from the University of Dayton School of Law (1979) where he was elected to Order of the Barristers for superior achievement in courtroom advocacy. He has an extensive background in health care law. He has prosecuted and tried healthcare related and other cases in the Pennsylvania courts as well as in Federal courts in Pennsylvania and Florida. His work experience includes serving as Pennsylvania Chief Deputy Attorney General for Medicaid/Healthcare prosecutions; Prosecuting Attorney for the State Board of Medicine in Pennsylvania; working with Social Security Disability; and in private practice where he represented clients in civil and criminal litigation matters.


Griffin Headshot

Karen Griffin, MS

Director of Administration

Karen Griffin has been a Gaudenzia employee since 1979. With a background in education and social service agencies, Ms. Griffin has held several positions at Gaudenzia. As Director of Administration she manages Gaudenzia's two Boards of Directors, program acquisitions and start-ups, strategic planning and incident investigation.


Johnson Headshot

Sharon Johnson, MBA

Director of Human Resources

Sharon Johnson has been with Gaudenzia for more than 15 years, and is the Director of Human Resources for the organization. Ms. Johnson is responsible for all aspects of human resources for over 900 full-time and 150 part-time employees.



 Director of Central and Western Region

Mark Sarneso, M.S.

Director of the Central and Western Region

Mark Sarneso holds a B.A. from York College of Pennsylvania and a M.S. from the University of Pittsburgh’s School of Social Work with a concentration in Child and Adolescent Development. He has over 35 years of increasingly responsible management positions in the behavioral health field. Mark also has extensive experience in advocacy of public policy, as he was Chairman of DASPOP (Drug and Alcohol Service Providers of Pennsylvania) for 17 years. 


Velasquez Headshot

Cecilia Velasquez, MHS

Director of the Eastern Region

Cecilia Velasquez has been with Gaudenzia since 1981 and has been in field of human services since 1974. Ms. Velasquez has worked with diverse populations including: chemical dependency, women/women and children, victims of domestic/sexual violence, dual diagnosis, homeless, community corrections and prisons. 


Carole Ziegler

Carole Ziegler

Director of Risk Management and Internal Audit

Carole Ziegler has been with Gaudenzia since 1985. Ms. Ziegler plans and completes internal audits of agency programs and departments, implements policies and procedures and assists in preparation of agency audit work-papers. She is the Chair the Safety Committee and manages the administration of the pension funds.