Lise Thibault first became involved in public service as a member of the commission established by the Québec Department of Education to oversee the language of instruction, and as the Provincial President of Canada Day Celebrations. She later became Vice-President for Relations with Beneficiaries at the Québec Occupational Health and Safety Commission and President and Director General of the Québec Bureau for the Handicapped. During the same period, Thibault sat on various boards of directors, including those of the Québec Rental Board and the Canadian Red Cross.
On 30 January 1997, Lise Thibault was sworn in as the 27th Lieutenant Governor of Québec; she was the first woman ever to hold this office in Québec. Recently, she has been awarded a Medal from the Édouard Montpetit Foundation of the Faculty of Social, Economic and Political Science at the University of Montréal as well as an Honorary Doctorate in Law from Concordia University. She also received the degree of Doctor of Civil Law (Honoris causa) from Bishop's University. She is a Dame of Justice in the Most Venerable Order of the Hospital of Saint John of Jerusalem, and in 2002 she was awarded the Golden Jubilee Medal of Her Majesty Queen Elizabeth II.
On 7 June 2007 Lise Thibault was succeeded as lieutenant-governor by Pierre DUCHESNE.
See also LIEUTENANT-GOVERNORS OF QUÉBEC: TABLE.