The world leader in subscriber driven intelligent access, Calix is unrivalled in delivering platform innovations for access networks that enable communications service providers to transform their businesses and be the winning service providers of tomorrow. To foster this vision, Calix has assembled a world-class executive leadership team from a wide variety of successful communications, data networking, and cloud companies.

Carl Russo, President and Chief Executive Officer

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Carl is president and CEO of Calix and a member of the board of directors. Carl has over 30 years of experience in the networking and telecommunications industries. Prior to taking an active role with Calix in December 2002, Carl was a member of the Calix board of directors. Before that, Carl was vice president of optical strategy and group vice president of optical networking for Cisco. Carl joined Cisco in 1999 as a result of the acquisition of Cerent Corporation, where he was president and CEO. Before Cerent, Carl was COO at Xircom (later acquired by Intel), where he was responsible for sales, marketing, development, and manufacturing of all Xircom products. Carl has also held executive management positions at Network Systems Corporation (later acquired by StorageTek) and at AT&T Paradyne. At Network Systems, Carl was the senior vice president and general manager for the Hyperchannel Networking Group, and at AT&T Paradyne he was vice president and general manager of the data networking products division. Carl attended Swarthmore College and served on its board of managers.

Cory J. Sindelar, Chief Financial Officer

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Cory is Chief Financial Officer at Calix, and has an extensive 25-year track record as a senior financial leader working for technology companies. He joined Calix from Violin Memory, where he was Chief Financial Officer. He also previously served as Chief Financial Officer of Ikanos Communications, leading several strategic transactions during his tenure. Cory also held various finance positions at EMC Corporation. Prior, Cory was vice president, corporate controller and principal accounting officer at Legato Systems, Inc., which was acquired by EMC. Cory holds a Bachelor of Science degree in Business Administration with an emphasis in accounting from Georgetown University.

Michael Weening, Executive Vice President Sales and Marketing

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Michael is the executive vice president of sales and marketing for Calix. Michael has over 20 years of experience leading sales growth, strategy and transformation having held executive positions in North America, Europe and Asia. He joined Calix from Salesforce.com where he was the senior vice president of Global Customer Success, and also held the role of senior vice president, Japan and Asia-Pacific Customer Success, Services and Alliances residing in Tokyo. Previously, Michael held leadership roles at Bell Mobility in Canada, where he was vice president of business sales. Prior, Michael held sales leadership roles at Microsoft, in Canada and London, U.K. Michael holds a Bachelor of Arts in Business Administration, from Brock University.

Matt Collins, Chief Marketing Officer

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Matt is chief marketing officer (CMO) for Calix, leading all corporate, field, and product marketing. Over the course of his career, he has built and led marketing and strategy teams at Dun & Bradstreet, IBM, McKinsey and Merck. Most recently, as SVP global marketing and go-to-market strategy at Dun & Bradstreet, Matt built D&B’s enterprise marketing capabilities and led the launch of its new cloud solutions and Global Lines of Business. Prior to joining D&B, he spent over a decade at IBM in senior Marketing and Strategy roles across IBM’s Software, Hardware and Services businesses. While at IBM Matt also led several cross-IBM “Smarter Planet” growth initiatives including Smarter Computing, Social Business and Smarter Workforce. While at McKinsey, he worked with many of the firms leading clients to help them transform their go-to-market strategies. Matt received his MBA from Harvard University and a B.A. from Dartmouth College.

Gregory Billings, Senior Vice President, Services

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Greg is the senior vice president of services for Calix. Greg brings over 25 years of business transformation and growth experience that spans strategy, software BU management, marketing, sales, business and partner development, new business launches, operations, services, systems implementation and practice management. Greg joined Calix from Zebra Technologies where he was the vice president of Global Professional Services and Solutions. Greg joined Zebra Technologies through its acquisition of Motorola Solution's Enterprise Business, where he served as vice president of Global Solution Sales and Professional Services. Prior to Motorola Solution's Enterprise Business, Greg has served as the Vice President of Avaya Global Professional Services, Division President & General Manager of Amdocs Customer Management Software Product Business Unit, Vice President in EY/Capgemini’s Telecom, Media & Entertainment Practice and as a Sales & Marketing Executive with Xerox. Greg holds a Bachelor of Arts in Economics and Political Science from The Colorado College.

Mehdi Bradaran, Senior Vice President, Product Operations

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As senior vice president of product operations, Mehdi is responsible for all systems hardware development, manufacturing operations, supply chain management, and quality systems. Mehdi also oversees all aspects of the Calix Development Center operations in China. Mehdi has over 30 years of development and operations experience in the aerospace and telecommunications industries. Prior to joining Calix, Mehdi held management positions at DSC/Alcatel and led engineering teams in hardware development and system integration of next generation digital loop carriers. Mehdi has also held various development and management positions at Lear Astronics and PowerTec. He holds a BSEE from Utah State University and an MSEE from West Coast University.

Michel Langlois, Senior Vice President, Products

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Michel is responsible for all systems product development and strategy across the Calix Unified Access portfolio. He has more than 25 years of experience in networking technologies, large-scale software development, and engineering management. Before joining Calix, Michel was Senior Vice President Junos software at Juniper Networks. Prior to Juniper, he served as Senior Vice President-Network Software and System Technology Group (NSSTG) responsible for the IOS software/platform at Cisco Systems. Michel has a BSEE from the Université de Sherbrooke in Quebec, Canada.

Diane Prins Sheldahl , Senior Vice President, Talent and Culture

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Diane is senior vice president of talent and culture at Calix, and responsible for all human resources functions as well as promotion of "The Calix Way." Her experience spans a wide variety of companies, from start-ups to the Fortune 10, with focus in technology, aerospace, manufacturing, and healthcare. Prior to joining Calix, Diane held key human resources leadership positions at SpaceX, Hewlett-Packard, Honeywell, Archive.com, Emcore/Ortel, Agere Systems, Abbott Laboratories, and Gateway. She earned her MBA from UC Irvine and holds a BA in Industrial Relations from Syracuse University.

Shane Eleniak, Vice President, Systems Products

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Shane leads the Product Management, Development and Cloud Operations organizations responsible for all Calix Products. He has more than 25 years of experience in the networking industry. Prior to joining Calix, Shane was the Group Vice President of the Advanced Broadband Solutions (ABS) business unit at CommScope, responsible for all edge, access and CPE products within the Broadband Division. Earlier in his career, Shane was EVP of Marketing and Business Development for Alloptic where he was the corporate officer responsible for all product and commercial operations. Shane previously held several key executive management positions in marketing, product management, business development and engineering at such industry leaders as Corrigent Systems, Alcatel-Lucent, and Telus. Shane holds a B.Sc. in Electrical Engineering from the University of Alberta.

Suzanne Tom, Vice President General Counsel

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Suzanne is general counsel for Calix and oversees all legal and regulatory aspects of the company's business. A seasoned tech sector veteran, Suzanne provides a wealth of diverse experience in the practice of law to Calix. Prior to joining Calix, Suzanne was vice president, corporate legal and compliance at Verifone Systems, Inc. Previously, she held a number of legal and corporate roles at Latham and Watkins, the U.S. District Court of Northern California, ONI Systems, Turnstone Systems, and Ernst & Young LLP. Suzanne has a JD from UC Hastings College of the Law, a BS in Business Administration from UC Berkeley and qualified as a CPA with Ernst & Young.

Jill Von Berg, Vice President, Information Technology

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Jill is vice president of information technology with responsibility for Calix IT strategy, enterprise applications, infrastructure, operations and information security. Jill joined Calix in 2010 with over 25 years multinational leadership experience in global high tech industries. Before joining Calix, Jill was vice president of Corporate IT at McKesson Corporation and held IT leadership positions at Hewlett Packard. Previously, Jill spent 10 years with ABB in Switzerland, where she built and led a worldwide IT shared services center for the ABB Group, and directed global technology programs for ABB Power. Earlier, Jill held various information systems management positions at GE Aircraft Engines, Ohio. Jill holds a BS in Engineering from the University of Leicester, England.