Mark J. Woyshville, MD

CEO & Medical Director

In May 2007, Dr. Woyshville established our office as an independent, free-standing, community-based clinical research enterprise focused on quality data and care.

Joann Berenda, CCRC

Chief Operating Officer

Joann's career in business brings a diversified background and approach to North Star. Her main focuses are business development, operations, and finance.

Mahmoud Abuhamda, CCRC

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Clinical Trial Coordinator

Mahmoud joined North Star Medical Research in 2015. His strengths include multiple years of phlebotomy, extensive medical education, and patient care.