Mara G. Aspinall , ,

Former President and CEO, Ventana Medical Systems and Global Head of Roche Tissue Diagnostics -
a worldwide leader in the development, manufacturing, and commercialization of tissue-based diagnostic equipment

Elected 2014

Member of the Audit Committee
Member of the Capital Management Committee
Member of the Nominating & Corp. Governance Committee

Julie A. Dobson , ,

Former Chief Operating Officer, TeleCorp PCS, Inc. - a wireless/mobile phone company that was acquired by AT&T Wireless, Inc.
Elected 2003

Member of the Capital Management Committee
Chair of the Compensation Committee
Member of the Nominating & Corp. Governance Committee

Stephen Fisher , ,

Senior Vice President and Chief Technology Officer, eBay Marketplaces, a multi-screen ecommerce experience for buyers and sellers around the world
Elected 2015

Member of the Audit Committee
Member of the Capital Management Committee
Member of the Compensation Committee

Andrew E. Lietz , ,

Retired Founder & Managing Director, Rye Capital Management, LLC - a private equity investment firm
Elected 2003

Chairman of the Board

George MacKenzie , ,

Retired Vice Chairman & Chief Financial Officer, Hercules, Incorporated - a global chemical specialties manufacturer
Elected 2003

Chair of the Audit Committee
Member of the Compensation Committee
Member of the Nominating & Corp. Governance Committee

Jack L. Messman , ,

Former Chairman & Retired Chief Executive Officer, Novell, Inc. - a provider of infrastructure software products
Elected 1994

Member of the Capital Management Committee
Member of the Nominating & Corp. Governance Committee

John J. Roberts , ,

Retired Global Managing Partner, PricewaterhouseCoopers LLP - a global professional services firm
Elected 2003

Member of the Audit Committee
Member of the Compensation Committee
Chair of the Nominating & Corp. Governance Committee

Robert J. Rosenthal Ph.D , ,

Chief Executive Officer, Taconic Biosciences - a leading supplier of research models for pharmaceutical and biotech organizations
Elected 2007

Member of the Audit Committee
Chair of the Capital Management Committee
Member of the Compensation Committee

Stephen T. Zarrilli , ,

President and Chief Executive Officer, Safeguard Scientifics, Inc.
Elected 2012

Member of the Capital Management Committee