Stiehm got her start in the entertainment industry writing for Northern Exposure and later Beverly Hills, 90210. She went on to write for NYPD Blue for four seasons, for which she earned an Emmy nomination for "Outstanding Writing for a Drama Series." After leaving NYPD Blue, Stiehm wrote for ER for two seasons. On both NYPD Blue and ER, Stiehm was one of very few women in the writer's room. In 2003, Stiehm developed her first series called "Cold Case", a CBS crime drama following a female homicide detective specializing in "cold cases," or unsolved murders, ranging from the early 2000s all the way back to the 1910s. The show explored many issues related to 20th centuryAmerican history, including sexism, racism, homophobia, anti-war activism and police brutality. In 2004, Stiehm was one of five female showrunners at CBS and, at 35, was the youngest among them. Stiehm remarked that she was mistaken for the lead actress on the first day of shooting. In 2005, Stiehm said that Cold Case had more women in senior positions than any other television show. In 2010, Cold Case was cancelled after seven seasons. In 2011, Stiehm joined the Showtime thriller Homeland as a writer and executive producer, writing several episodes in the first two seasons. Stiehm was the show's sole female writer. Stiehm left Homeland after two seasons to develop the FX series The Bridge, based on the Danish/Swedish series The Bridge. Set on the border between El Paso and Juárez, the show followed two detectives – one from the U.S., Detective Sonya Cross, and one from Mexico, Marco Ruiz - who worked together to hunt down a serial killer operating on both sides of the U.S.-Mexican border. Due to creative differences with her co-producer, Stiehm left the series after one season and returned to Homeland. The Bridge was cancelled after its second season. In September 2018, it was announced that Stiehm was adapting the bestselling novel "The Banker's Wife" for television. In 2019, as WGA Co-Chair, Stiehm joined other WGA members in firing her agents as part of the Guild's stand against the ATA and the unfair practice of packaging.
Awards and nominations
Emmy Award, "Outstanding Writing for a Drama Series", for NYPD Blue, 1998