 He has performed as a soloist in most European countries, and, as a chamber musician, has collaborated with Reinhard Goebel, Monica Groop, Erich Höbarth and many others.He has been a director of many ensembles, and has conducted many works, including Handel's Acis and Galatea and Haydn's L'isola disabitata for the Finnish Chamber Opera, and Monteverdi's L'incoronazione di Poppea for the Finnish National Opera.Häkkinen will make his Edinburgh International Festival debut in August 2019 with a recital of Bach keyboard concertos.