Since 1992, Dunlap has been President of the American Antiquarian Society, a national research library of American history in Worcester, MA. Previously she was director of the Rosenbach Museum & Library in Philadelphia and research librarian at the Harry Ransom Center at the University of Texas at Austin. Long active in national organizations, she has been chair of the Independent Research Libraries Association and a member of the board of Rare Book School at the University of Virginia. She is a frequent speaker at professional conferences on topics ranging from fundraising and inter-institutional cooperation to professional ethics and library digitization. Dunlap was instrumental in the founding of the Philadelphia Consortium of Special Collections Libraries in 1985 and has recently served two terms as chair of the Worcester Cultural Coalition, which she helped to found in 1995. She served as president of the board of the Massachusetts Foundation for the Humanities from 2002-2004, and has served as chairman of the Non-profit Support Center, a program of the Greater Worcester Community Foundation, where she is currently board member and clerk.