She joined the firm Kelly & Co. in September 1997 and received her law clerk diploma from the Institute of Law Clerks in 2000 and became licensed as a paralegal by the Law Society of Upper Canada in 2008. Ann Marie has provided per diem prosecution services for matters concerning the Provincial Offences Act for both Halton Region and the Ministry of the Attorney General. Ann Marie is a board member of the paralegal advisory committee at Conestoga College, a member of the Prosecutors Association of Ontario and an associate member of the Institute of Law Clerks. In 2013, Ann Marie became the first elected paralegal board member of the Waterloo Region Law Association, where she was a trustee and treasurer until 2017.