Dionne A. Tate's career at the City of Chicago's Office of Emergency Management and Communications (OEMC) began in December 2004 as a 911 call taker. She was quickly promoted to Dispatcher and transitioned to an administrative role, where she gained in-depth knowledge of OEMC operations by working closely with the Executive Directors' office, the First Deputy's office, and Emergency Management. As a liaison for OEMC with other city agencies, she played a key role in ensuring seamless communication and operations across departments.

In 2014, Dionne was named Deputy Director of 911 Operations, where she managed the 24/7 operations of the city’s emergency services, overseeing critical planning and goal setting to align the division with department objectives. She developed work standards while managing the implementation of new or modified processes. By 2019, she was appointed Deputy Director of Training, Investigations, and FOIA, where she led multiple teams, streamlined processes to improve efficiency, and reviewed and approved essential training materials and policies.

Dionne was instrumental in the partnership with City Colleges and the implementation of the Intro to Emergency Management class currently offered at Malcolm X, Kennedy King & Olive Harvey.

Now serving as the Director of 311 City Services, Dionne brings her extensive experience in public safety and operational leadership to enhance the efficiency, technology, and services provided to the residents and visitors of Chicago.

Dionne attended St. Dorothy Catholic Grammar School and Whitney M. Young Magnet High School. She holds a B.S. in Organizational Management and a M.S. in Public Safety Administration from Calumet College of St. Joseph. She is married, with one son, three daughters, and one granddaughter. Passionate about community service, Dionne is a proud member of Top Ladies of Distinction, Inc., Will County Black Diamond Chapter, and Delta Sigma Theta Sorority, Inc., Chicago Alumnae Chapter.