Kristina Schake, former aide to California first lady Maria Shriver and co-founder of the political consulting firm Griffin Schake, has been named First Lady Michelle Obama‘s communications director and special assistant to the president.

Schake is replacing Camille Johnston, who stepped down in August to work at Siemens Corporation. She will start in December.

In her role, Schake will help the First Lady expand her work with military families. She will also be an asset to Michelle Obama’s “Let’s Move” program to combat childhood obesity. She was previously director of Governor Arnold Schwarzenegger’s Summit on Obesity and comms director for First 5 California, which works on children’s health issues.