Mark is vice president of major account sales for Calix. Mark runs sales groups focused on tier-one and tier-two US service providers as well as all service providers in Canada, the Caribbean, and South America. Before joining Calix in March, 2005, Mark had a long career with Nortel Networks in a variety of senior sales, marketing, and business development roles. Most recently, Mark was director of market development for broadband networks at Nortel, where he established relationships with third parties and attained revenue targets during the first year of the business unit's operation. Prior to Nortel, Mark held various senior engineering and management positions in the software industry. Mark received a BS in electrical engineering from Purdue University.