Jeannine Lagassé joined the Nova Scotia Civil Service in 1998 after practicing law in the private sector in Ottawa and Halifax. From 1998 to 2004, Jeannine was a member of the Department of Justice Legal Services Division and provided legal advice to various departments. During this time, she completed the Master of Public Administration (Management) program at Dalhousie University. Beginning in 2005, Jeannine worked at the Nova Scotia Treasury and Policy Board as a Senior Corporate Policy Analyst, responsible for policy development in the area of governance and accountability relating to government agencies. Between 2009 and June 2017, Jeannine was the Executive Director Executive Council Office and then the Secretary to the Executive Council. In 2017, Jeannine was appointed Associate Deputy Minister of Health and Wellness and, in December 2019, was appointed Acting Deputy Minister of Health and Wellness.