Lynne M. Castonguay, B.Ps, M.A.Ps., J.D., has been with the Université de Moncton for 28 years and has held the position of Secretary General of the University since 2006. Reporting to the President, she is a member of the Senior Executive Team and sits as Secretary General on all committees of higher authorities, oversees the organization of official and protocol ceremonies, and signs, after the President, all official documents of the University, including the diplomas of graduates. Ms. Castonguay is the official custodian of the University's seal, registers, archives and official documents.

Ms. Castonguay served on CUBA-ACCAU board between 2015 and 2021 and was responsible for its Professional Development Day in 2019.  She was Vice-President of the International Group of General Secretaries for la Francophonie (GISGUF), President of the Organizing Committee of the International Symposium (2016) and served on its board of directors between 2014 and 2018. Ms. Castonguay is a past president of the Association des juristes d'expression française du Nouveau-Brunswick (AJEFNB).