Blaine worked as a lay missionary in Jamaica before moving to Chicago's Edgewater neighborhood in 1983 to take a job with Pax Christi, an international Catholic peace movement.
Blaine je radila kao laička misionarka na Jamajki prije nego se preselila u čikaški Edgewater 1983. godine radi preuzimanja posla u Pax Christiju, međunarodnom katoličkom mirovnom pokretu.