
Recognized Leaders in Telecom and Data Networking
Focused exclusively on helping telecommunications services providers deliver a rich set of IP-based information, communication, and entertainment services over access networks built to be operated at the lowest possible cost, Calix has assembled a world-class senior management team from a broad variety of successful telecom and datacom companies.
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
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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
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Industry Leaders With a Mix of Operating, Venture Investing, and Financial Experience
Guiding the first 21st century telecommunications equipment supplier, Calix is led by a board of directors with a unique mix of operating, investing and financial experience.
Michael Ashby
Executive Vice President and Chief Financial Officer
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Michael Matthews
Head of Strategy and Business Development, Nokia Siemens Networks
Carl Russo
President and Chief Executive Officer
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Carl Russo, President and Chief Executive Officer
Carl is president and CEO of Calix and a member of the board of directors. Carl has over 25 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 sits on the board of directors for Vital Network Services, Inc. Carl is an alumnus of Swarthmore College and serves on its board of trustees.

Roger Weingarth, Executive Vice President and Chief Operating Officer
Roger is executive vice president and COO for Calix. In this role, Roger leads all product, field, and manufacturing operations. Roger has over 27 years of experience in the networking and telecommunications industries. Prior to joining Calix in March, 2003, Roger was president and CEO at Arista Networks, a developer of wavelength management solutions for optical core networks. Before Arista, Roger was president and COO at Optical Solutions, where he successfully grew the organization to meet the demands of the emerging FTTP market. Roger has held senior management roles in operations and quality assurance with Centron, Switched Network Technologies, and Network Systems Corporation. In addition, Roger has held various management positions within ATT/NCR Corporation. Roger holds a BA from Bethel College and an MBA from the University of Minnesota. He is also certified by the American Production and Inventory Control Society in production and inventory management.

Andy Lockhart, Senior Vice President, International Sales and Marketing
Andy is senior vice president, international sales and marketing at Calix, with overall responsibility for the establishment and development of Calix's international business. Andy joined Calix after over twenty years at Cisco, where he developed a wide range of international and cross-cultural leadership experience. Most recently, Andy held worldwide sales responsibility for the integration of Cisco's largest acquisition in recent years. Andy was instrumental in establishing many of Cisco's largest international business operations, including the founding of Cisco Japan, building Cisco's Asia Pacific partner network, establishing Cisco's UK Sales operation, and launching Cisco's European Service Provider organization. He also led a number of Cisco's major international organizations, including leadership roles as vice president Cisco Japan, vice president Northern Europe, and Vice President Benelux.
A dual British-Canadian citizen who resides in London, Andy has trilingual language capabilities including Japanese and French. He holds an MBA from Stanford University and an electrical engineering degree from the University of British Columbia.

John Colvin, Senior Vice President, North American Sales and Marketing
John is senior vice president of North American sales and marketing for Calix. John is responsible for all customer-facing functions, including sales, field marketing, and customer support. John has over 23 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.
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.
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.
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.
Skip Hirvela, Vice President Regional Sales, West
Skip is vice president of regional sales for Calix focused on the Western US. Skip is responsible for all direct sales activities with service providers in this region. A 20 year veteran of the telecommunications and networking industry, Skip previously was a regional sales manager at Calix, leading targeted sales teams to market leadership positions across numerous geographies. Prior to Calix, Skip held numerous sales and marketing roles at the director or manager level at a variety of telecommunications firms, including Myrio, NetworkTwo Communications, DecisionOne, Reltec, and AT&T Global Information Systems. Skip holds a BS degree in business administration from Miami University and an MBA from the University of Dayton.

David Seda, Vice President, Field Marketing
David is vice president of global field marketing, responsible for the marketing of Calix systems and solutions. He joined Calix in August 2011 with 24 years of international experience in networking, consumer electronics, and enterprise technologies. He spent 13 years at Cisco, most recently serving as managing director and general manager of West Africa Sales. Previously, in London he was head of marketing for Cisco Europe, Middle East & Africa (EMEA), helping establish Cisco's presence in emerging markets. Earlier at Cisco headquarters, David was senior director of corporate marketing, where he developed strategic global marketing programs. At Hewlett Packard, David was vice president of marketing for EMEA. Before HP and Cisco, he spent 10 years at Apple in engineering, marketing, and later as senior director of communications reporting to the Apple CEO. David holds an MBA from Texas Tech University and Bachelor's degrees in Computer Science, Economics, and Business Management from Graceland University in Iowa. He is currently a guest lecturer at the Helsinki School of Economics in Finland.

Michael Ashby, Executive Vice President and Chief Financial Officer
Michael is executive vice president and chief financial officer of Calix, and a member of the board of directors. Prior to Calix, Michael was vice president of finance at Cisco, with responsibility for financial planning and investor relations. Michael joined Cisco in 1999 as a result of the acquisition of Cerent Corporation, where he was CFO. Prior to Cerent, Michael was executive vice president and CFO of Ascend Communications (later purchased by Lucent). Earlier, Michael was vice president and CFO at Pacific Telesis Enterprise Group, a division of Pacific Telesis Group, Inc. (later purchased by SBC Communications). Michael has also held the executive management positions of CFO, president, and CEO at Network Systems Corporation, and CFO of Teradata Corporation. Michael currently serves on the Board of Directors and chairman of the audit committee of Canary Foundation, a non-profit organization devoted exclusively to early detection of cancer.
Kevin Pope, Senior Vice President, Product Development
As senior vice president, product development, Kevin is responsible for all aspects of the company's product development and product strategy. An industry veteran, he has more than 20 years of experience in engineering management and product development. Before joining Calix, Kevin was vice president of engineering for Hammerhead Systems and co-founder and vice president of engineering for Mahi Networks. Before founding Mahi Networks, he served as vice president of development engineering for Applied Digital Access. Kevin has held roles in marketing and design at ASEA HAFO and as a member of the technical staff at AT&T Bell Labs. Kevin has a BSEE from the University of Minnesota, an MSEE/CS from the University of California at Berkeley, and an MBA from San Diego State University.

Todd Ortberg, Senior Vice President, Business and Market Development
Todd is senior vice president of business and market development for Calix. Todd has 24 years of experience across the communications, networking, and software industries. Before joining Calix, he was president and CEO of network software technology vendor Alvarri. Prior to Alvarri, Todd was managing director of Coral Capital Management, where he led communications investments in dozens of venture backed companies. Todd has also held leadership roles at ADC Telecommunications, where he served as vice president and general manager of its Cable Access Systems division and vice president of engineering. Prior to ADC Todd held numerous marketing and engineering management positions with Rockwell International and Texas Instruments, and was an adjunct faculty member at Upper Iowa University, where he taught Business Strategy. Todd has an MBA from the University of Iowa and a Bachelor of Science in Engineering from Iowa State University.
Tony Banta, Senior Vice President, Global Manufacturing and Supply
Tony is senior vice president of manufacturing operations for Calix with responsibility for all aspects of worldwide manufacturing and supply chain operations. Before joining Calix in September 2005, Tony held a variety of senior manufacturing positions at Cisco, including vice president of worldwide operations. Tony joined Cisco as a result of its acquisition of Grand Junction Networks, where he was vice president of manufacturing. Previously, Tony held senior management positions with Vitalink Communications and Teledyne MEC. Tony has a BS in aeronautics from San Jose State College, an MS in aeronautical engineering from Wichita State University, an MBA from Golden Gate University, and served ten years in the U.S. Air Force.
Mehdi Bradaran, Vice President, Product and China Operations
Mehdi is vice president of product and China operations at Calix. In this role Mehdi oversees all aspects of the Calix Development Center operations in China, as well as the engineering services team responsible for all mechanical design and regulatory compliance activities. Mehdi has over 28 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.
Omar Ramadan, Vice President, Global Customer Services
Omar is vice president of global customer services for Calix. He has over 15 years of customer service experience in the networking and telecommunications industries. Omar oversees all aspects of customer support, training, documentation, and web-based tools. Prior to joining Calix, Omar was with Advanced Fibre Communications (AFC) working in a number of support-related positions, most recently as director of technical services. At AFC, Omar was responsible for building a technical organization that supported over 750 North American service providers. Before AFC, Omar managed installation activities of outside plant loop electronics at DSC (now part of Alcatel). Omar earned a BS in electrical engineering from Texas A&M University.
Jill Von Berg, Vice President, Information Technology
Jill is vice president of information technology with responsibility for all aspects of global IT strategy and operational direction. She has over 25 years of experience in high tech industries and leading multi-national IT organizations. Prior to joining Calix, Jill was vice president of Corporate IT at McKesson and held management positions at Hewlett Packard. Previously Jill directed global IT services for the ABB Group, was assistant vice president for technology at ABB Power in Switzerland and held management positions at GE Aircraft Engines, Ohio. She began her career as a gas turbine design engineer with Rolls-Royce in the UK. Jill holds a BS in Engineering from the University of Leicester, England.
Tish Rutledge, Vice President, Talent and Culture
As vice president, talent and culture, Tish is responsible for all aspects of the company's global human resources strategy. An industry veteran, she has more than 20 years of experience in human resources management. Before joining Calix, Tish was director of human resources for The Learning Company. Prior to that, she was director of human resources at Mindscape (acquired by The Learning Company). Tish has also held roles in human resources at Tosoh Medics, Nichirei, and DiGiorgio Corporation. Tish has a BS in Business Administration from California State University, Northridge and certifications in Global Human Resources and Senior Human Resources.

Denis Quinlan, General Counsel
Denis Quinlan is general counsel for Calix. Denis oversees all legal and regulatory aspects of Calix's business. Denis has over 20 years of diverse experience in the practice of law. Prior to joining Calix, Denis served as senior counsel to Motorola, Inc., supporting its Wireline Access Networks businesses. He had rejoined Motorola via its acquisition of Next Level Communications, Inc., where he served as associate general counsel. Denis spent time abroad as general counsel to Cesky Mobil, a wireless telecommunications operator in the Czech Republic. Before that, he served a prior term with Motorola, where he helped build that company's extensive portfolio of ownership interests in international wireless operating companies. He has also worked as counsel to insurance-industry giant Aon Corporation and as a litigator with the law firm of Baker & McKenzie. Denis is a graduate of Loyola University of Chicago (BA in English), and received his JD from the University of Illinois College of Law.
Don Listwin, Chairman
Don Listwin is founder and chairman of Canary Foundation, a non-profit organization devoted exclusively to early detection of cancer. A 25-year veteran of the technology industry, Don was CEO of Openwave from 2000 to 2004 and held senior executive positions at Cisco Systems between 1990 and 2000. Don also serves on the board of directors at Sana Security, Genologics, and Stratos Bioscience. He has previously served on the boards of Openwave, JDS Uniphase, Redback Networks, TIBCO Software, E-Tek, and the Cellular Telecommunications & Internet Association (CTIA). Don is a member of the Board of Trustees at the Fred Hutchinson Cancer Research Center in Seattle Washington. A native of Canada, Listwin holds a B.S. in electrical engineering and an honorary doctorate of law from the University of Saskatchewan.
Michael Ashby, Executive Vice President and Chief Financial Officer
Michael is executive vice president and chief financial officer of Calix, and a member of the board of directors. Prior to Calix, Michael was vice president of finance at Cisco, with responsibility for financial planning and investor relations. Michael joined Cisco in 1999 as a result of the acquisition of Cerent Corporation, where he was CFO. Prior to Cerent, Michael was executive vice president and CFO of Ascend Communications (later purchased by Lucent). Earlier, Michael was vice president and CFO at Pacific Telesis Enterprise Group, a division of Pacific Telesis Group, Inc. (later purchased by SBC Communications). Michael has also held the executive management positions of CFO, president, and CEO at Network Systems Corporation, and CFO of Teradata Corporation. Michael currently serves on the Board of Directors and chairman of the audit committee of Canary Foundation, a non-profit organization devoted exclusively to early detection of cancer.
Michael Everett, Director
Michael Everett has over 30 years of financial, legal, and general management experience, including two different stints in China. Michael currently serves as a financial executive at Cisco Systems, Inc. and was chief financial officer of WebEx Communications prior to Cisco's $3.2 billion acquisition of the web collaboration leader. Prior to joining WebEx, Michael was chief financial officer of several public and private companies, including Netro Corporation, a broadband wireless equipment manufacturer that he led through a successful IPO in 1999, and Raychem Corporation, a Fortune 500 telecommunications and electronic components supplier. Before joining Raychem in 1987, he practiced securities law as a partner at Heller, Ehrman, White & McAuliffe. Michael holds a B.A. from Dartmouth College and a J.D. from the University of Pennsylvania Law School.
Michael Flynn, Director
Michael T. Flynn has served as a director of Calix since September 2004. Most recently, Michael served as an officer of ALLTEL Corporation, an integrated telecommunications provider of wireless, local telephone, long-distance, competitive local exchange, Internet and high-speed data services. Previous positions at ALLTEL include Assistant to the Chief Executive Officer, Group President of Communications and President of the Telephone Group. Since July 2001 Mr. Flynn has served on the Board of Directors and Audit Committee of Airspan Networks, a publicly-traded company providing wireless broadband access equipment. Since January 2004 he has been a member of the Board of Directors and Audit and Compensation Committees of WebEx Communications, a publicly-traded company providing web collaboration services. Michael has also served on the Board of Directors GENBAND, and BayPackets. Michael earned his B.S. degree in Industrial Engineering from Texas A&M University in 1970. He attended the Dartmouth Institute in 1986 and the Harvard Advanced Management Program in 1988.
Adam Grosser, Director
A Calix board of directors member since 2009, Adam most recently served as general partner at Foundation Capital. Prior to joining Foundation Capital, Adam was president of Excite@Home's 1,400-person Subscriber Networks division, as well as co-founder, president and CEO of Catapult Entertainment. Before his startup life, Adam worked at technology innovators Apple Computer, Lucasfilm, and Sony in engineering and management capacities. He currently serves on the boards of Control4, Conviva, EnerNOC (ENOC), GridIron, Naverus, Rohati, SiBEAM and Silver Spring Networks. In addition, he has previously served on the boards of Arroyo (CSCO), Alteon WebSystems (NT), Peribit Networks (JNPR) and Traverse Networks (AV). Adam holds a BA in applied science, as well as a master's degree in science and an MBA from Stanford University. Adam is also a lecturer at the UCLA School of Film and Television, and contributes to National Public Radio's Marketplace.
Michael Matthews, Head of Strategy and Business Development, Nokia Siemens Networks
Michael Matthews is currently head of strategy and business development at Nokia Siemens Networks. He also directs Nokia Siemens Networks' strategic planning and investments, mergers and acquisitions program and strategic alliances and partnerships. Michael was previously chief marketing officer at Amdocs Inc. and the executive vice president, sales and marketing, and an integral part of the start-up team at Groove Networks. Prior to this, he served in leadership positions across technology companies such as Platinum Technology, Sterling Software, and Digital Equipment Corporation in the United States and Australia. Michael has a degree in Civil Engineering from the University of Queensland, Australia.
Thomas Pardun, Director
Thomas (Tom) Pardun has served as chairman of the board of directors of Western Digital Corporation, a manufacturer of hard-disk drives for the personal computer and home entertainment markets, since March 2007. He previously served as chairman of Western Digital from January 2000 to November 2001, and he has served as a director of Western Digital since January 1993. In July 2000, Tom retired as president of MediaOne International, Asia-Pacific (formerly US West Asia-Pacific), an owner/operator of international properties in cable television, telephone services, and wireless communications. Prior to that, he served as president and chief executive officer of US West Multimedia Communications, Inc. and held numerous other executive positions with US West. Prior to joining US West, Tom was president of the Central Group for Sprint as well as president of Sprint's West Division. He also served as senior vice president of United Telecommunications, a predecessor company to Sprint. Tom spent the first 19 years of his career at IBM. Tom served on the board of directors of Occam Networks, Inc. from September 2004 to January 2011. In addition to Western Digital Corporation, he serves on the boards of CalAmp Corporation, Finisar Corporation, and MaxLinear, Inc., each a publicly-held company. Tom received a B.B.A. in economics and marketing from the University of Iowa and Management School Certificates from Harvard Business School, Stanford University, and The Tuck School of Business at Dartmouth College.
Carl Russo, President and Chief Executive Officer
Carl is president and CEO of Calix and a member of the board of directors. Carl has over 25 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 sits on the board of directors for Vital Network Services, Inc. Carl is an alumnus of Swarthmore College and serves on its board of trustees.
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