Hartley began working as the executive director for the Democratic Mayors' Conference for the Democratic National Committee from 1974 until 1977. She then worked as director of congressional relations in the United States Department of Housing and Urban Development from 1977 until 1978. She then worked as an associate assistant to the president in the Office of Public Liaison in the White House during the administration of President Jimmy Carter, from 1978 until 1981. From 1981 until 1983, Hartley worked as a vice president for Group W Cable, and she then was a vice president of corporate communications at Westinghouse Broadcasting from 1983 until 1985. She was then a vice president of marketing for MCA Broadcasting from 1985 until 1987. From 1987 until 1989, Hartley was station manager of WWOR-TV. From 1994 until 2007, Hartley worked for the G7 Group, serving as CEO from 1995 until 2007. Beginning in 2007, she became the chief executive officer of the Observatory Group, which is an economic and political consulting advisory firm with offices around the world. On January 26, 2011, President Obama nominated Hartley to serve on the board of the Corporation for National and Community Service. The U.S. Senate confirmed her by unanimous consent on April 26, 2012.
U.S. Ambassador to France
On June 6, 2014, President Obama announced his intention to nominate Hartley to be United States Ambassador to France and the United States Ambassador to Monaco to replace Charles Rivkin, whom Obama tapped to become an assistant Secretary of State. Obama formally nominated Hartley on June 9, 2014. Hartley is known for being a campaign bundler who raised more than $500,000 for Obama's re-election bid in 2012. On September 16, 2014, the U.S. Senate confirmed Hartley in a voice vote to be the U.S. ambassador to France and the U.S.'s ambassador to Monaco. She took her oath of office on October 15, 2014, from Vice President Joe Biden. On January 11, 2015, Hartley represented the United States at a unity march in Paris following the Charlie Hebdo shooting. In June 2015, following revelations that the U.S. had spied on French political leaders, Élisabeth Guigou, president of the Foreign Affairs committee in the National Assembly, invited Hartley to appear before members. Hartley declined the invitation. In late 2015, Hartley proposed that Jeff Koons create an artwork to be offered to the City of Paris in homage to the victims of the 2015 terrorist attacks. The resultant work, "Bouquet of Tulips", has raised objections in the French art world that it is inappropriate, as has the singlehanded nature of Koons' selection.
Personal
Hartley is married to investment banker and Evercore Partners CEO Ralph Schlosstein. They have two children. She has been a member of the Council on Foreign Relations for more than 10 years.