Under the leadership of SJC's first female President, Mrs. Mirtha Peralta, SJC becomes the 28th Member of the Association of Jesuit College and Universities.

St. John's College was officially made a member of the Association of Jesuit Colleges and Universities (AJCU) in 2020. However, due to the pandemic, we had to pause our celebration of such a monumental event. Finally in 2023, SJC was able to host all members of the AJCU for a week of activities leading up to the Missioning Mass. At the Missioning Mass, Rev. Brian Christopher S.J., Mrs. Mirtha Peralta, President, and Mrs. Martha Guerra, Board Chair, signed the MOU between St. John's College and the Association of Jesuit Colleges and Universities. The Missioning of St. John's College is as follows:

"The USA Central and Southern Province of the Society of Jesus affirms its sponsoprhip of St. John's College as an apostolate of the province and full member of the Jesuit School Network and the Association of Jesuit Colleges and Universities."

The Celebrant of the Missioning Mass was Rev. Thomas Greene, S.J., Provincial. The Concelebrants were the Society of Jesus, Rev. Douglas Marcouiller, S.J., General Counselor and Regional Assistant for North America (Rome), and Rev. Brian Christopher, S.J., Jesuit Superior, Belize. Furthermore, within the Missioning Mass, the ethnic groups of Belize had representation through songs, prayers, and petitions. After the Mass, the members and faculty and staff were treated to steel pan music and a delicious turkey dinner buffet.