After four years in rugby league, Suniula returned to union with the Chicago Griffins in 2010. The following season he joined RFU Championship side Cornish Pirates, appearing 16 times for the club during the 2011–12 season. Suniula returned to Chicago Griffins the following season before joining his first top flight professional rugby union side when he signed for the London Wasps for the 2013–14 season.[4] He made five appearances for the club during his brief one-year stint. Suniula joined CSM București for the 2015 Romanian Rugby Championship season.[5]
In 2018 Suniola signed for Austin Elite and quickly became team captain, but by 2019 he was semi-retired and was succeeded as captain by Ben Mitchell.[6]
International career
Suniula represented the United States in rugby union from 2008 to 2016 and played 39 tests including four matches in the 2011 and 2015 World Cups.[7][8]