[5] Poirier joined the Vermont Army National Guard in 2006, and her assignments included company commander, Tactical Information Operations Course instructor, and personnel staff officer (S-1) of the 124th Regiment (Regional Training Institute).

[5] She then attended the United States Army War College (AWC), from which she graduated in June 2017 with a Master of Strategic Studies degree.

[8] In January 2021, Poirier left her position as assistant vice president for student affairs at Norwich University to become the full-time chief of staff for the Vermont Army National Guard.

[5] Poirier's awards include:[10] In 2018, Norwich University began construction of a memorial staircase to commemorate the bicentennial of the school's 1819 founding.

[11] The steps were built between the southeast corner of the Upper Parade Ground and the Sullivan Museum and History Center, and contain the names of 78 prominent individuals, including Poirier, who are associated with the university.