In 2014 Westad became the inaugural holder of the S.T. Lee Chair of US-Asia Relations at Harvard University. While at Harvard, Professor Westad taught international affairs and global history at the John F. Kennedy School of Government. At Harvard, he was also a Senior Scholar at the Harvard Academy of International and Area Studies. In 2019, Westad joined Yale University, where he now teaches courses in global and international history. He is based both in the Yale History Department and in the Jackson Institute of Global Affairs.