She was part of the delegation of Dominican women at the First Feminist Encounter of Latin America and the Caribbean, held in Bogotá, Colombia, in 1981.

[citation needed] Galván coordinated the first convention of Black Women in Latin America and the Caribbean, held in the Dominican Republic in 1992.

[citation needed] In 2001, at a UN conference in South Africa, Galván - alongside Dorotea Wilson and Nirva Camacho - argued for greater recognition of the 150 million Afro-descendent people in Hispanophone countries.

She was also an alternate delegate before the Inter-American Commission of Women of the Organization of American States (OAS) in 2009,[6] a member of the Women's Committee of Latin America and the Caribbean preparatory for the Human Rights Conference held in 1993 in Vienna, a member of the Women's Committee of Latin America and the Caribbean preparatory for the Beijing Conference held in 1995 in China,[7] and a member of the international committee to follow up the Durban I World Conference against Racism 2001, which first met in 2003.

[citation needed] In 2023, she joined the Board of Directors of Ipas, a reproductive health nonprofit focused on access to abortion and contraception.