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 Inc., a leading e-commerce company
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 and Director of Taconic Biosciences, Inc., a provider of research models for pharmaceutical and biotechnology researchers
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