Mariana graduated from Universidad Austral, Buenos Aires, Argentina in 2008. After graduating law school, she worked in the tax group of a leading law firm in Buenos Aires, in both litigation and transactional tax matters. While working in Buenos Aires, she pursued a Master Degree in Tax Law from Universidad Torcuato Di Tella, and later an LL.M. from Boston College, in Boston, United States. After her LL.M., she served as a law clerk for the Hon. William G. Young at the U.S. District Court for the District of Massachusetts.

Mariana currently practices corporate and tax law at Preti Flaherty in the United States, where she advises local and international clients on corporate and tax legal matters. Mariana also advises foreign investors on US immigration law issues.