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Executive Team

Carl Russo
President and Chief Executive Officer

Roger Weingarth
Executive Vice President and Chief Operating Officer

Andy Lockhart
Senior Vice President, International Sales and Marketing

John Colvin
Senior Vice President, North American Sales and Marketing

Mark Dressler
Vice President, Major Account Sales

Nathan Harrell
Vice President, National Account Sales

Ken Grelck
Vice President Regional Sales, East and Canada

Skip Hirvela
Vice President Regional Sales, West

David Seda
Vice President, Field Marketing

Michael Ashby
Executive Vice President and Chief Financial Officer

Kevin Pope
Senior Vice President, Product Development

Todd Ortberg
Senior Vice President, Business and Market Development

Tony Banta
Senior Vice President, Global Manufacturing and Supply

Mehdi Bradaran
Vice President, Product and China Operations

Omar Ramadan
Vice President, Global Customer Services

Jill Von Berg
Vice President, Information Technology

Tish Rutledge
Vice President, Talent and Culture

Denis Quinlan
General Counsel

Directors

Don Listwin
Chairman

Michael Ashby
Executive Vice President and Chief Financial Officer

Michael Everett
Director

Michael Flynn
Director

Adam Grosser
Director

Michael Matthews
Head of Strategy and Business Development, Nokia Siemens Networks

Thomas Pardun
Director

Carl Russo
President and Chief Executive Officer

Ken Grelck

Ken Grelck, Vice President Regional Sales, East and Canada

Ken is vice president of regional sales for Calix focused on the Eastern US and Canada. Ken is responsible for all direct sales activities with service providers in these regions. Ken brings a wealth of experience in leading sales organizations in the telecommunications, networking and services industry. Prior to Calix, Ken was a 22 year veteran of Nortel, where he held numerous vice presidential roles, including leadership of North America sales and services, major account sales, Americas sales and marketing, and Sprint sales. Ken holds a BS degree in business administration from the University of New York, an MBA from Campbell University, and served 4-years in the US Air Force.
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