Get to know our leadership team, experts and board members who are dedicated to achieving a world without HIV/AIDS. Under their guidance and strategic oversight, Vivent Health makes it possible for all clients, allies, staff and donors to thrive together.

Board of Directors

Ronald Dunn, Board Chair


Madison, WI

Jane Appleby

Advocate Aurora Healthcare

Milwaukee, WI

Arvan Chan

Centene Corporation

St. Louis, MO

Eric Conley

Froedtert Health

Milwaukee, WI

Nancy Flagg

Ernst & Young

Milwaukee, WI

Booker Gatson II

Apple Inc.

Littleton, CO

Mike Hughes

Hughes Collaboration

Denver, CO

Brad Kalscheur

Michael Best

Milwaukee, WI

Dan Kaplan

Foley & Lardner

Madison, WI

George MacKinnon III,
Ph.D., MS, RPh

MCW Pharmacy School

Milwaukee, WI

Gordon Myers

U.S. Bank

St. Louis, MO

Chris Price

International Community Development

Denver, CO

Mike Romano


Aurora, CO

Tamim Sifri, DDS

Smart Dental, LLC

Madison, WI

Lisa Vanlerberghe


Milwaukee, WI

Senior Leadership Team

Mike Gifford

President & Chief Executive Officer

Tawnya Brown, MSW

Vice President of Operations (Missouri)

Leslie Cockerham, MD, MAS

Vice President of Medical Affairs

Timothy D. Dyer, CPA

Executive Vice President & Chief Financial Officer

Debra J. Endean, Ph.D.

Executive Vice President & Chief Operating Officer

Tony Fields, PharmD

Vice President & Chief Pharmacy Officer

J. Daniel Guinn, JD, MA

Vice President of Compliance and General Counsel

Bill Keeton

Vice President & Chief Advocacy Officer

Dan Mueller

Vice President & Chief Development Officer


Vice President of Information Technology

Kevin Roeder, Ph.D., MSW, LCSW

Vice President of Operations (Wisconsin)

Freda Russell, Ph.D.

Vice President of Cultural & Organizational Development

Karin Sabey

Vice President of Operations (Colorado)

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