[9][10] She holds higher education degrees in business administration, sociology, and political science from the University of Costa Rica,[11] economics from the Latin University of Costa Rica, a master's in Advanced Techniques of Management and Political Decision from the Gadex Program in Madrid, Spain,[12] and a master's in International Cooperation for Development from the Cultural and Social Studies Foundation in Madrid.
[17] In Costa Rica, Campbell played a key role in the approval of the Inter-American Convention against Racism, Racial Discrimination, and Related Forms of Intolerance (2016).
[18] Campbell is a descendant of Jamaican migrants and carries the name of her grandmother, Epsy,[19] whom she considers her main life inspiration, as narrated in the book "Luchadoras" by the Inter-American Institute for Cooperation on Agriculture (IICA).
[21] Her sister Shirley is an anthropologist, activist, and Afro-Costa Rican poet, author of the poem "Rotundamente negra", which has become a symbol for Afro-descendant women in Latin America.
[30][31] During her terms as a deputy, Campbell focused primarily on issues related to structural fiscal reform, emphasizing the progressivity of the tax system and efficiency in public spending.
[32] She championed the constitutional reform for the removal of deputies who failed in their duty of probity,[33] the proposal to repeal the National Intelligence and Security Directorate (DIS), the initiative to regulate lobbying in public functions, the declaration of August as the historical month of Afro-descendants in Costa Rica,[34] the Law to Prevent and Punish All Forms of Discrimination, Racism, and Intolerance, a bill to prohibit the commercialization of illegal lotteries, and the Law against Street Harassment.
[35] As a member of the Commission on Control of Income and Public Spending, she participated in investigations on the setting of rates by the Regulatory Authority for Public Services, the lack of execution of funds from an international loan with the International Bank for Reconstruction and Development to finance the Limón Ciudad-Puerto project, as well as the government's intention to acquire the El Tobogán Corporate Center to build the so-called "Government City".
She condemned remarks by PIN candidate Juan Diego Castro alleging that female members of the Judiciary advanced in promotions due to sexual favors.
[37] She made official visits to Panama, Colombia, Italy, the Vatican and Spain to strengthen bilateral relations and expressed Costa Rica's position regarding the crises in Nicaragua and Venezuela at the Organization of American States, the EU-CELAC summit, and the UN General Assembly.
Campbell advocated for an immediate cessation of repression against protesters and arbitrary detention, urging respect and guarantee of fundamental rights such as freedom of expression and political participation.
The country maintained a chargé d'affaires instead of an ambassador and advocated for the intervention of the Organization of American States and a national agreement to address the crisis in Venezuela.
Also, it urged to stop violence, release political prisoners, ensure human rights, and achieve a peaceful resolution of the conflict by calling on the forces of Venezuelan society to find viable solutions and common points of interest.
[37] Technical criteria were established in the allocation of office expenses abroad, and new guidelines for personnel hiring were implemented, favoring the application of the legislation of host countries to reduce conflicts and costs to the public treasury.
A Budget Planning and Execution System was implemented as a computerized tool to comply with the Procurement and Contracting Manual, facilitate administrative-financial management, and enhance accountability for embassies.
[citation needed] In addition to her role as a professor at the University of Costa Rica, she has led projects such as the analysis and monitoring of the incorporation of Afro-descendants in the Americas, funded by AECID between 2011 and 2013.
[citation needed] Campbell was the driving force behind the International Day for People of African Descent, declared by the United Nations General Assembly[38] through Resolution 75/170 on 16 December 2020.
[47] The initiative to establish this forum arose after Campbell advocated before the General Assembly and in various bilateral meetings for the urgency of creating this body with the purpose of improving the quality of life for Afro-descendant people worldwide.