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. In December 2020, Mario was appointed as a Vice-Chair of the COVID-19 Vaccine Distribution Task Force.

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.

Karen Ellis
Deputy Solicitor General,
Correctional Services

Karen Ellis

Karen Ellis became Deputy Solicitor General, Correctional Services in July 2021.

Karen has over 30 years of diverse and extensive experience in Canada’s federal public service encompassing policy, operations, service delivery and three regional postings. She has worked in 11 different federal departments and agencies including the Privy Council Office, National Defence, the Canada Revenue Agency, Natural Resources Canada and Veterans Affairs.

As a federal executive, Karen held increasingly senior positions over 20 years, culminating in 7 years as an Associate Deputy Minister, in 3 different posts.

Karen has led diverse teams to many accomplishments, through significant changes, and has adapted successfully to different mandates and cultures throughout her career.

Most recently, Karen served as the Assistant Deputy Minister of Institutional Services within the Ontario Ministry of the Solicitor General, where she had strategic and operational oversight and accountability for 25 adult correctional facilities, including provincial jails, detention centres, correctional centres, and treatment centres.

Karen brings her focus on people, and her expertise and experience in change management and leadership development to all of her work in public service.