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
Omar Ramadan
Vice President, Global Customer Services
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
Robert Balsamo
Vice President, Product Strategy
Miguel Alonso
Vice President, Software Products
Jill Von Berg
Vice President, Information Technology
Tish Rutledge
Vice President, Talent and Culture
Michael Ashby
Executive Vice President and Chief Financial Officer
Michael Matthews
Chief Corporate Development Officer for AGT International GMBH
Carl Russo
President and Chief Executive Officer
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Nathan Harrell, Vice President, National Account Sales
Nathan is vice president of national account sales at Calix, focused on tier-two U.S. service providers. An industry veteran, Nathan has over 25 years of experience in generating growth with successful companies. Prior to Calix, Nathan was vice president of sales at Occam Networks (acquired by Calix). Nathan also served as vice president of sales (Americas) for Redback Networks. Before that, he served in several capacities at Cisco Systems, including area director for the greenfield area and operations director/general manager positions for both the Qwest and Sprint accounts. Earlier in his career, Nathan held positions at Telco Systems as vice president of sales, Sprint as director of national sales and Scientific Atlanta.
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