She served as minister counsellor for political affairs at the US embassy in Moscow from 2006 to 2009 and was director of Maghreb affairs. Wells also served as executive assistant to Secretary of State Hillary Clinton from 2011 to 2012, and to Undersecretary for Political Affairs William J. Burns from 2009 to 2011. She served as an assessor at the foreign service board of examiners in 2013 and was special assistant to the president for Russia and Central Asia in the White House from 2012 to 2013.