As posted by Carlota in Maxima's bio-thread:
Princess Máxima passed her baccalaureate examinations at Northlands School in 1988.
She graduated in economics from the Universidad Católica Argentina in 1995.
From 1989 to 1990, while still at university, she worked for Mercado Abierto SA, where she did research into software for financial markets.
From 1992 to 1995, she worked in the Sales Department of Boston Securities SA in Buenos Aires. She also taught English to children and adults, and mathematics to secondary school pupils and first-year students.