Chicagoland Smile Group is led by an established, experienced senior management team, Board of Directors, and clinical advisors, committed to guiding and strengthening the organization as it grows by developing and implementing best practices in every area.


Charles Zasso, DDS, FAGD, MBA

Charles Zasso, DDS, FAGD, MBA

Chief Dental Officer

With over two decades of clinical and administrative experience in Dental Support Organizations (DSOs), Charles Zasso, DDS, FAGD, MBA, leads the clinical support and development for the dentists of Chicagoland Smile Group’s network of affiliated locations.


Jeff McCall

Jeff McCall

Chief Executive Officer

Jeff is the Chief Executive Officer of Chicagoland Smile Group (CSG). He brings a wealth of deep experience in building and scaling successful, high-growth multi-site service organizations. He has expertise in building service-oriented support capabilities to empower high performing practice-level activities and associates while delivering an excellent patient experience.


Daniel Dohnalek

Daniel Dohnalek, DDS

Director of Clinical Development

Dr. Daniel Dohnalek joins Chicagoland Smile Group after three decades of practicing dentistry, and he continues to work clinically at the Manus Lake Zurich office. Dr. Dohnalek graduated from Indiana University, where he earned a Bachelor of Science Degree in Biology. He earned a Doctorate Degree from the University of Illinois College of Dentistry in 1983.


Leanne Wypych

Leanne Wypych

Vice President of Operations

Leanne Wypych joins Chicagoland Smile Group’s leadership team with nearly 20 years of multi-site dental operations experience, including growing the general and specialty dentistry practices at Manus Dental.


Fletcher Boyle

Fletcher Boyle

Vice President, Corporate Development & Strategy

Fletcher joined CSG in 2016 with extensive experience in the finance industry as well as mergers and acquisitions with ATI Physical Therapy. He played an instrumental role in expanding ATI’s national footprint through the successful integration of over 50 ATI partners.

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