Former EA executive Owen Mahoney will replace Susan Choe as CEO at free-to-play MMO publisher Outspark.

Most recently, Mahoney served as senior VP of corporate and business development at Electronic Arts, where he led acquisition activities, equity investments and strategic partnerships. At Outspark he’ll be charged with expanding the North American firm’s global user base.

According to Outspark, it already “has the largest free-to-play MMO audience” in the States. Since launching in 2007, the company says it has amassed a global registered user base of more than 4.7 million and its website currently attracts 5.4 million unique visitors a month.

Last month the micro-transaction based online games firm secured $8.3 million in Series C funding.

Outspark’s founder and previous CEO, Susan Choe, will continue to serve as chairman of the board and work to secure developer partnerships.

“Since founding Outspark early 2007, the Freemium MMOG market has evolved dramatically,” she said. “Outspark’s team has built a leading game publishing company, executing solid growth while bringing together a unique MMOG publishing platform with social community elements. With Owen’s leadership and business experience in the global gaming industry, Outspark will evolve as a leading global game industry player.”