MacKubin began exhibiting her works and winning awards in the United States, London and Paris beginning in 1893. She exhibited her work at the Palace of Fine Arts and The Woman's Building at the 1893 World's Columbian Exposition in Chicago, Illinois. In 1897 she won the bronze medal and diploma at the Tennessee Exposition. Her life-sized portrait of Cardinal Gibbons was exhibited in 1903 in Baltimore and in 1904 at the St. Louis Exposition. She exhibited at the Royal Academy of Arts and made portraits of the Marchioness of Bath, the Countess of Warwick and others in England.