[2] She attended the school established by Salomé Ureña, known as "Instituto de Señoritas" and which was the first higher education facility in the Dominican Republic.

She then worked in the school founded by her classmate Luisa Ozema Pellerano and her sister Eva María[1] and then served for 30 years in the Institute of Salomé Ureña.

[4] When the United States invaded and occupied the Dominican Republic in 1916, Aguiar joined with a vocal group of women, to form the Sociedad Amantes de a Luz (Society of the Lovers of the Light of Day).

[5] She served in the same capacity on the Junta Patriótica de Damas (Board of Patriotic Ladies)[6] These ladies were striving for the recognition of not only nationalist rights, but women's rights and worked on various causes, including establishment of maternity and children's hospitals, orphanages, and nurses' training facilities; free health care and medical services for the poor, health campaigns throughout the country to end endemic diseases, nutrition education, sanitary housing and playgrounds for working class neighborhoods and child care centers for working mothers; and educational improvements including school breakfasts and lunches, adequate uniforms, development of school libraries, and trade education.

[9] In 1945, Aguiar was one of the special delegates appointed to counsel the Convention of the Dominican Party so that "The Reform of the Principles and Statutes" addressed the concerns of women.