Confirmed Judges for the 2019 Challenge

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Bill Clinton

Founder and Board Chair, Clinton Foundation and 42nd President of the United States

Mami Mizutori

Mami Mizutori

Special Representative of the UN Secretary-General (SRSG) for Disaster Risk Reduction

Kate Gilmore

Kate Gilmore

United Nations Deputy High Commissioner for Human Rights



Mariya Gabriel

Mariya Gabriel

European Commissioner for Digital Economy and Society



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Stewart Butterfield

CEO and co-founder of Slack

Claudia Nemat

Claudia Nemat

Member of the Deutsche Telekom AG Board of Management, Technology and Innovation



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Jim Zemlin

Executive Director, The Linux Foundation

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Dr. Elizabeth Hausler

Founder and CEO of Build Change

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Trevor Riggen

Senior Vice President, Disaster Cycle Services, American Red Cross

Tom Peck

Tom Peck

Executive VP and Chief Information and Digital Officer, Ingram Micro Inc.



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Michelle Nunn

President and CEO of CARE USA

Steve Ewell

Steve Ewell

Executive Director, Consumer Technology Association Foundation