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Calix Leadership

Carl Russo
President and Chief Executive Officer

Roger Weingarth
Executive Vice President and Chief Operating Officer

John Colvin
Vice President, Field Operations

Mark Dressler
Vice President, Major Account Sales

Ken Grelck
Vice President Regional Sales, East and Canada

Skip Hirvela
Vice President Regional Sales, West

Robert Checketts
Vice President, Field Marketing

Kelyn Brannon
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, Manufacturing Operations

Omar Ramadan
Vice President, Customer Service

Denis Quinlan
General Counsel

Mark Dressler

Mark Dressler, Vice President, Major Account Sales

Mark is vice president of major account sales for Calix. Mark leads sales groups focused on tier-one and tier-two US service providers as well as all service providers in the Caribbean and South America. Before joining Calix, Mark held a variety of senior sales, marketing, and business development roles at Nortel, most recently serving as director of market development for broadband networks. Prior to Nortel, Mark held various senior engineering and management positions in the software industry. Mark holds a BS in electrical engineering from Purdue University.
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