Ministry of the
Solicitor General

Deputy Solicitors General

Deputy Solicitors General

Mario Di Tommaso
Deputy Solicitor General,
Community Safety


Mario Di Tommaso was appointed Deputy Minister of Community Safety in October 2018 and became Deputy Solicitor General, Community Safety, when the ministry became the Ministry of the Solicitor General in April 2019.

Previously, Mario held the rank of Staff Superintendent of Communities and Neighbourhood Command with the Toronto Police Service. Mario has more than 38 years of progressive policing experience in community safety, homicide, major crime, intelligence, national security, drug investigations, major incident management, community relations, professional standards, and divisional policing. 

Mario held several positions over his career at the Toronto Police Service and served on various committees, the Mayor’s Committee on Supervised Injection and Overdose Prevention sites and the Toronto Drug Strategy Implementation Panel, among others. Mario also co-chaired the Chief of Police’s Muslim Community Consultative Committee. 

Mario holds a bachelor’s degree in Justice Studies from the University of Guelph Humber and a Certificate in Law Enforcement and Administration from the University of Toronto and is a Graduate of the Senior Management Institute for Police.  He also holds the Certified Municipal Manager designation. In 2017, Mario graduated from the IALG – Pearls in Policing Program, a Senior International Police Leadership Program.

Mario was invested into the Order of Merit for the Police Forces by the Governor General at the Officer rank and has also received the Police Exemplary Service Medal - 30-year bar and the Queen’s Diamond Jubilee Medal.

Deborah Richardson
Deputy Solicitor General,
Correctional Services


Deborah Richardson is well-known for her caring and collaborative style. Her proficiency at building relationships has resulted in wide-ranging, positive impacts across the Ontario Public Service.

Ms. Richardson obtained her undergraduate degree in Sociology and Law from Carleton University, completed her Bachelor of Laws at the University of Ottawa, and was called to the Bar in 1996.

She began her career in criminal law and then moved into the finance industry, where she worked in business banking before becoming the Manager of Diversity for the Royal Bank of Canada. 

In 1999, she was appointed Executive Director of the Native Canadian Centre of Toronto where she led the Centre’s growth to become one of the most significant urban Indigenous organizations in Canada.  Much sought after for her financial and operational expertise, she then served as Director of Operations and Business Development for the OI Group of Companies.

In 2004, Ms. Richardson was recruited into the federal public service, and later became Regional Director General for Ontario at Indian Affairs and Northern Development Canada. In this role, she was responsible for the federal department's largest regional organization, and its largest operational budget. 

In 2008, Ms. Richardson was recognized as a Top Leader under 40 and selected for the Governor General in Leadership Program.  In that same year, she was appointed Assistant Deputy Minister for the Aboriginal Relationships and Ministerial Partnerships Division of the Ontario Ministry of Aboriginal Affairs. She would later serve as Assistant Deputy Minister for the Ring of Fire Secretariat at the Ontario Ministry of Northern Development and Mines.

In 2013, she took a leave of absence from the Ontario Public Service to lead an Indigenous engagement on a national energy project.

In November 2014, Deborah Richardson became Deputy Minister of the Ontario Ministry of Indigenous Affairs. She has led province-wide, comprehensive reconciliation efforts with Indigenous peoples, including a provincial response to the Truth and Reconciliation Commission’s Calls to Action; initiatives geared towards ending violence against Indigenous women and girls; resolving land claims; implementing OPS-wide Indigenous Cultural Competency Training; and many economic development initiatives.

In July 2019, she was appointed Deputy Solicitor General, Correctional Services, responsible for the operations and progressive strategic direction of one of Ontario’s largest ministries.

Deborah Richardson is a proud Mi'gmaq woman with strong ties to her home community of Pabineau First Nation in New Brunswick.  Together, Deborah and her husband, Bob, have five children: Jasmine, Fiona. Katherine Faith, Griffin and Miigwans.