Liwski won his first international gold medal in 2002 at the three seat of the United States 8+ in the Nations Cup World Championships. He then won gold again in the United States 8+ at the 2003 Pan-American Games. Liwski sat in the five seat of the United States 8+, which came fourth in the final World Cup event before the Athens Olympics, but rowed as the Olympic team spare by the time the crew went on to win Gold in Athens. A year later he competed internationally again, this time at the World Cup event at Dorney Lake, Eton. Liwski, and Oxford crewmate Michael Blomquist, finished ninth there in the coxless pair.