John McDonald is VP of Business Operations at Poshmark, a mobile fashion marketplace built around real-time social experiences. John developed deep expertise in marketplace management during his eight years at eBay, first building new merchandise categories and then leading trust and safety for the US marketplace. He moved to Ning, an online community platform, where he managed the business to profitability after it was acquired by Glam Media. Earlier in his career, John held senior marketing roles at keen.com, homes.com, and evite.com. He received his BS from University of California, Berkeley and his MBA from Harvard Business School.