Aimee García Cortese was born to Puerto Rican parents in New York City on May 26, 1929. She was named after the famous Pentecostal evangelist Aimee Semple McPherson,

Aimee decided to go into the ministry at age fifteen. After discussing the desire with one minister, she was told, "Las mujeres no predican" (Women do not preach). Despite this discouragement, her father (who was a Pentecostal minister) encouraged her to go into the ministry. She attended the Hispanic American Bible School in New York City and then Central Bible College (CBC) of the Assemblies of God in 1951. Licensed to preach in 1951, she was later ordained by the Wesleyan Methodist Church (1964) and the Assemblies of God (1974).

In 1983 she founded Crossroads Tabernacle Church of the Assemblies of God in the South Bronx. It grew from a few dozen people in 1983 to fifteen hundred members in the 1990s. Her church is one of the largest multicultural churches in New York City.

Sister Aimee passed to her heavenly reward on December 12, 2021.