David C. Pollock (June 9, 1939 – April 11, 2004) was an American sociologist, author, and speaker known for his expertise on Third Culture Kids (TCKs).
Pollock was the founder and executive director of Interaction International and co-author of Third Culture Kids: Growing Up Among Worlds.
His definition of TCKs is widely referenced: [A] person who has spent a significant part of his or her developmental years outside the parents' culture.
Although elements from each culture are assimilated into the TCK's life experience, the sense of belonging is in relationship to others of the same background.
[2] Throughout his life Pollock played a variety of roles as a speaker and consultant for the U.S. State Department and a number of embassies, a board member for organizations centered on TCKs, and the Director of Transitions for Global Associates.