Membership
As a member of the senior Estonia men"s national volleyball team, Treial competed at the 2015 Men"s European Volleyball League, finishing in 4th place and at the 2015 Men"s European Volleyball Championship, finishing in 11th place.
As a member of the senior Estonia men"s national volleyball team, Treial competed at the 2015 Men"s European Volleyball League, finishing in 4th place and at the 2015 Men"s European Volleyball Championship, finishing in 11th place.