 Blomstedt even invited him to join him at the Baltic Sea Festival the same season and the Bamberg Symphony re-invited him to come back for four concerts with his compatriot Pietari Inkinen in November 2007.Highlights of the season 2009/2010, for instance, were concerts with the WDR Sinfonieorchester Köln under Semyon Bychkov and the City of Birmingham Symphony Orchestra.In October 2009 Antti Siirala gave his celebrated debut with the San Francisco Symphony Orchestra under Osmo Vänskä and was re-invited immediately.