Rennie was a member of St Joseph’s since 1962. Throughout her life, she leaned into her faith to get through difficult times. Rennie was active in Rotary-Anns, HIHO -Happiness is Helping Others, Book Clubs, and the Oasis Program. She was an elementary school teacher at various schools over many years. She also taught English As A Second Language in the City of Rochester, at School 17.