[7][8] In the Panamanian government, Mouynes was appointed Chief of Staff of the Ministry of Commerce and Industries in 2004 and Vice Minister of Multilateral Affairs and Cooperation in 2019.

[9] During her tenure at the Ministry of Foreign Affairs, Mouynes addressed multiple global and regional issues, focusing on climate change, digital inclusion, irregular immigration, and gender inequality.

[10][5] Her diplomatic achievements include leading efforts to form the first-ever alliance of countries that are carbon negative and securing environmental protections for the Eastern Tropical Pacific Marine Corridor.

[11][12] Mouynes actively represented Panama in international forums such as the Forum of Countries of Latin America and the Caribbean on Sustainable Development 2022, the Organisation for Economic Co-operation and Development (OECD), and the Smart Women, Smart Power Conversation at the Center for Strategic and International Studies, emphasizing the importance of sustainability and gender equality in solution building.

[15] Currently, Mouynes chairs the Board of the Atlantic Council-Adrienne Arsht Latin America Center and is a fellow at the Harvard University Advanced Leadership Initiative.