Thayz Guimarães is a nonresident journalist fellow in the Atlantic Council’s Global China Hub and a Brazilian reporter with more than ten years of experience. Guimarães is an international news reporter focused on international security, especially maritime security.

In 2024, Guimarães was awarded Brazilian Navy’s Friend of the Navy Medal for her journalism covering the sea and maritime power in the country. She holds a BA in journalism and an MA in communication studies from State University of Rio de Janeiro. She is an alumna of the US State Department’s International Visitor Leadership Program.