The close ties between ICA and its neighboring exclusive school for boys and co-member of the EDSA-Ortigas Consortium (EDSOR), Xavier School, that can be seen today can be traced to the 1950s. At the invitation of the Jesuits who were then building Xavier School in 1958 in the newly opened subdivision in Greenhills, the MIC Sisters also constructed a building that was completed in 1960; thus, the Sisters were ready to receive the Chinese Filipino students from ICA-Intramuros, which continued to operate the elementary department and kindergarten. In 1975, ICA-Intramuros was fused with ICA-Greenhills. At present ICA-Greenhills has a population of 3,381 with 1,009 in the high school department.