American Indian Graduate Center, a leading Native scholarship provider in the United States, has welcomed Amber Garrison to its Board of Directors.      Garrison, of Choctaw Nation of Oklahoma, is currently the senior vice president and global general manager for hair care brand Bumble and Bumble. For nearly a decade, Garrison has worked for The Estée Lauder Companies, the parent company of Bumble and Bumble, where she has held roles of increasing responsibility with a focus on strategy,...