Adachi was a consulting partner for Deloitte. She also served on the board. She started working at Deloitte 1990. She was the first Asian-American woman to serve as a principal at the San Francisco-based Deloitte office, in 1995. In 2008, she became national managing principal for the Initiative for the Retention and the Advancement of Women of Deloitte. In 2008, she was inaugurated into the Working Mother's Hall of Fame. The following year, she was named a "working hero," by the Professional Business Women of California. She has been named one of the most influential women in San Francisco multiple times, from 2003 until 2008, and again, in 2011 and 2012, by the San Francisco Business Times most influential women in San Francisco, California. She has served on the board of numerous organizations, including the Girl Scouts of the USA. In 2012, she was honored at Consulting Magazine's Achievement Awards. Adachi has published work in Forbes.