Sister Monica was previously a post-doctoral resident at the Reading Hospital and Medical Center, where she supervised the outpatient dual diagnosis program and provided individual and group therapy for adults with addictions and mental illness. She has also served as a therapist and school counselor at various schools and behavioral health centers in the Philadelphia area.

In addition to school counseling, she is experienced in school administration, having served as the principal of Saint Veronica School, St. Peter School, Sacred Heart School, and Immaculate Heart Elementary School over the course of seventeen years. At each of these schools, she participated in their instructional services teams for counseling and psychoeducational referrals. She has also taught in the elementary school systems of the dioceses of Allentown, PA and Lima, Peru.