She calls the group her "Big Three."
RELATED: Philadelphia Mayor-elect Cherelle Parker looking for 'best and brightest from across the city'
Tiffany Thurman will serve as Chief of Staff, Sinceré Harris will be Chief Deputy Mayor of Intergovernmental Affairs, Sustainability, and Engagement and Aren Platt will serve as Chief Deputy Mayor of Planning and Strategic Initiatives.
Parker says the selections have experience in federal, state and city government, as well as business and non-profit work.