Walker is very active in the non-profit community. She is 2nd Vice Chair on the Board of Directors of The Seattle Foundation, a leading philanthropic non profit organization in creating positive community change. She is past president of the ARCS Foundation Seattle Chapter and board vice president of the Museum of History and Industry. She currently serves as board chair of the Bullitt Foundation an MOHAI, is co-chair of the Prosperity Partnership’s Cultural Task Force, and is president elect of the Seattle Art Museum. A strong advocate of the environment, education and the arts, Walker has led the boards of the Henry Art Gallery, the Woodland Park Zoological Society and the Washington Women’s Foundation. She is a founding member of the Foundation, first Chair of the board and Planning Committee, two time grant committee member, and helped lead the development of the Foundation’s endowment  In addition, she is a past board vice president of Washington Audubon and Seattle Children’s Home. Walker chaired Art Fair Seattle for five years and headed up Campaign UW for the College of Arts and Sciences. She is co-founder of Social Venture Partners, a network of engaged donors and nonprofits teamed to leverage their knowledge and experiences for the good of the community.