Boston—Hill, Holliday announced that Kristi Argyilan has been promoted to exec VP-general manager, from exec VP-media group. In her new position, she will be responsible for leading the agency’s communications planning, media innovation and go-to-market strategy. She fills a position that had been vacant for two years. Also, Brian Whipple, exec VP-director relationship marketing, will assume duties of chief operating officer. He succeeds Joe Norberg, who is leaving the agency after 20 years.