On December 24, 2018, Poehling was named to Team USA's roster for the 2019 World Junior Ice Hockey Championships. Poehling scored a natural hat-trick and one assist on December 30, 2018 against Team Sweden to help close a 4–0 gap and lead the game to overtime. While Team USA lost to Team Finland 2–3 in the gold medal round, Poehling was named the tournament MVP and best forward. He ended the tournament with eight points (5G, 3A) in six games.