She attended the Conservatory of Theatrical Arts at SUNY Purchase[1] before breaking into television as Carrie Brady on the daytime soap opera Days of Our Lives in 1992.
During the 1990s, Middendorf built her career as a supporting actress in several television movies and episodes of series, including Beverly Hills, 90210 (the recurring role of Laura Kingman during the show's fourth season), Murder, She Wrote, Star Trek: Deep Space Nine, The X-Files, Angel, Ally McBeal, Chicago Hope, and Millennium.
In March 1995, she resumed her stage career in Los Angeles playing Nicole Warren Diver in F. Scott Fitzgerald's Tender is the Night directed by Simon Levy at the Fountain Theatre.
[5][6] During the 2000s, Middendorf had guest-starring stints in Six Feet Under, CSI: Crime Scene Investigation, and Cold Case, among other shows, and had recurring roles in 24, The Division, Alias, and Lost.
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