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U.S.-based Daiichi Sankyo Leaders

Our leadership team inspires and challenges every aspect of the organization to develop life-changing solutions for the patients of today and tomorrow. Along with their peers who sit overseas, this dynamic and experienced group of U.S.-based leaders enable us to create innovative medicines that can change the standard of care.

Corporate Management

Ken Keller

Chairman of the Board, President and Chief Executive Officer of Daiichi Sankyo, Inc. and Global Head of the Daiichi Sankyo Oncology Business

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Ken Takeshita, MD

Global Head, Research & Development
 

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Daniel switzer

Head of U.S. Oncology Business Division

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Global Oncology Business (U.S.-based leaders)

Ken Keller

Chairman of the Board, President and Chief Executive Officer of Daiichi Sankyo, Inc. and Global Head of the Daiichi Sankyo Oncology Business

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Rich Jones

Vice President, Global Oncology Business Strategy & Analytics

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Ahmed Kotb, MD

Head of Global Oncology Medical Affairs

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Research & Development (U.S.-based leaders)

Ken Takeshita, MD
 

Global Head, Research & Development

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Michael Grosso, MD, FACS

Global Head of Specialty Medicine Clinical Development

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Dalal Nesheiwat, PharmD

Head of R&D Operations

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Sandy Milligan, MD, JD

Head of Global Regulatory Affairs

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Mark Rutstein, MD

Head of the Therapeutic Area Oncology 

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Michele Schmidt

Head of Asset Strategy & Project Management
 

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Dale E. Shuster, PhD

Head of Global Precision Medicine

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U.S. Oncology Business

Daniel Switzer

Head of U.S. Oncology Business Division
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Brian Hauser

Vice President, US Sales
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Kara Reheis

Vice President, U.S. Marketing
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Lerryn Trzcinski

Vice President, U.S. Market Access
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Patricia L. Judson, M.D.

Head of U.S, Medical Affairs
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Mark Chraplyvy         

Vice President, US Business Operations
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Other U.S.-based leaders

Stu Mackey, JD         

Global Head Business Development
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Matt Allegrucci         

Chief Compliance Officer, Head of Global Compliance & Risk Management
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James Felix                 

Head of Global Digital Transformation (DX), Chief Digital Transformation Officer
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Amy Todd Klug, Esq.

General Counsel & Secretary
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Simon King

Chief People Officer
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Mila Tartakovsky

Head of US Finance and Global Oncology Finance
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Daiichi Sankyo, Inc. Board of Directors

Chairman of the Board, Corporate President & CEO Ken Keller
Director Dick Van Duyne
Director, Global Head of R&D Ken Takeshita
Director, Head of US Oncology Business Div. Dan Switzer
Director (Independent) Hiroyuki Fujita*1

1Hiroyuki Fujita is the Chairman of Canon Healthcare USA, INC. etc.
To view the Board of Directors of our parent company, Daiichi Sankyo Co., LTD., visit: https://www.daiichisankyo.com/about_us/mission-strength/leadership/

Last Updated: June 2025