Michael Walter Michalak (born 1946)[1][2] is the former career Foreign Service officer and United States Ambassador to Vietnam from 2007 to 2011.

[3] He currently serves as Senior Vice President and Regional Managing Director for the US-ASEAN Business Council.

He received a second master's degree in public administration from the John F. Kennedy School of Government at Harvard University in Cambridge, Massachusetts.

[3][4] After joining the Foreign Service, Michalak has served in different posts and agencies, including: He was the U.S. Senior Official to APEC from November 2005 until his appointment as Ambassador to Vietnam.

Prior to the APEC responsibility, he served again at the U.S. Embassy Tokyo, as Minister-Counselor of the Economic Section (2000–2004) and Deputy Chief of Mission (2004–2005).