KIRSTINE STEWART oversees Twitter's North American media partnerships across all vertical channels, including television, sports, music and news. Previously, she served as Managing Director for Twitter Canada, leading Canadian operations and advertising business and partnerships. Prior to joining Twitter in May 2013, Stewart was the executive vice-president of CBC's English services, CBC/Radio-Canada, where she oversaw the network's English-language radio, television and digital operations. Earlier, she was senior vice-president of programming for Alliance Atlantis, overseeing HGTV, Food Network, National Geographic, BBC Canada and others. Stewart earned a bachelor's degree from the University of Toronto, and is a graduate of the Global Leadership in the 21st Century program at Harvard University's Kennedy School of Government. Most recently,Playback Magazine named Stewart its Person of the Year 2012, and Strategy Magazine recognized her leadership in taking CBC to Brand of the Year 2012. She is @kirstinestewart on Twitter.