Sundher joins the Americans after spending the last couple of seasons with Olomouc HC in the Czech league. Prior to that, he had stops in the ECHL with Reading and Elmira. He has 139 games in the American Hockey League, the majority with the Rochester Americans, where he played from 2012-15.
A third-round selection (75th overall) of the Buffalo Sabres in the 2010 NHL Entry Draft, Sundher played his junior hockey with the Chilliwack Bruins for parts of four seasons, from 2008-11. He also had stops with Victoria and the Brandon Wheat Kings.