After graduating from Brown University in 2013, Antonia began working in finance for a boutique firm. After three years at the Levin Group, she left the company to return to her native South America and joined the Surpapel Group, an independent and integrated corrugated packaging group comprising three companies with 220 million USD in annual revenue. She began overseeing the group's procurement division with a primary focus on raw materials. In 2018, she became a director at the company and is now responsible for helping to manage and plan financial strategies for the group and was the lead for the 82.5 million USD loan the group received in 2020. She also oversees ESG compliance and future improvements.