Executive Team

Carl Russo
President and Chief Executive Officer

William Atkins
Executive Vice President and Chief Financial Officer

Mehdi Bradaran
Senior Vice President, Product Operations

John Colvin
Senior Vice President, North American Sales

Michel Langlois
Senior Vice President, Systems Products

Andy Lockhart
Senior Vice President, International Sales

Todd Ortberg
Senior Vice President, Strategic Development

Diane Prins Sheldahl
Senior Vice President, Talent and Culture

Miguel Alonso
Vice President, Software Products

Robert Balsamo
Vice President, Advanced Technology and Architecture

Mark Dressler
Vice President, Major Account Sales

Nathan Harrell
Vice President, National Account Sales

Eoin Heaney
Vice President, Partners

Skip Hirvela
Vice President Regional Sales, U.S.

Michael Horn
Vice President, Strategic Alliances

Gilbert Lévesque
Vice President, Product Engineering

Omar Ramadan
Vice President, Customer Services

David Seda
Vice President, Marketing

Purnam Sheth
Vice President, Core Infrastructure

Suzanne Tom
Vice President, General Counsel

Jill Von Berg
Vice President, Information Technology


Don Listwin

Christopher J. Bowick

Kevin DeNuccio

Michael Everett

Michael Flynn

Adam Grosser

Michael Matthews

Thomas Pardun

Kevin Peters

Carl Russo
President and Chief Executive Officer

John Colvin

John Colvin, Senior Vice President, North American Sales

John is senior vice president of North American sales for Calix. John has over 25 years of experience in the networking and telecommunications industries. Before joining Calix in April, 2004, John was senior director of business development at Cisco, where he assisted in driving overall sales strategy and portfolio direction in the global service provider market. John joined Cisco in 1999 as a result of the acquisition of Cerent Corporation, where he was director of national carrier sales. Prior to Cerent, John was account vice president for AT&T at Alcatel. During the first half of his eight-year career with Alcatel, John was the manager responsible for day-to-day engineering activities, sales support, and program management of projects with AT&T, MCI, and Sprint. John joined Alcatel through its acquisition of Rockwell International, where he was a systems engineer. Earlier, John was an engineer with NEC America. John has a BS in electrical engineering from Texas A&M University.
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