She is best known for playing the role of Lillian Raines on the CBS soap opera Guiding Light from 1983 until the show's final broadcast in 2009.
She then joined the cast of the CBS soap opera Search for Tomorrow, playing Patti Barron Tate McCleary from 1976–1977.
Her Off-Broadway credits include Blithe Spirit, The Song of Bernadette, The Bread Man, The Art of Falling, The Labor Party, and What Are You Doing For Lunch Today?
[3][2] Sloan was cast as Lillian Raines on the CBS soap opera Guiding Light, first airing in May 1983.
[3] She played a Waiting Room Patient in the film Celebrity (1998), directed by Woody Allen.
[5] She played a Kensington Guest in The Curse of the Jade Scorpion (2001), also directed by Woody Allen.
[3] Sloan played Mrs. Delano in the thriller film Changing Lanes (2002), co-starring with Ben Affleck.
[14] In 2010, Sloan wrote a nonfiction book, Changing Shoes: Getting Older--NOT OLD--with Style, Humor, and Grace.
[16][17] In 2014, Sloan began playing Louise Cassell on the web series Beacon Hill.