Xavier's major areas of practice include corporate and commercial law, banking and finance, private equity, foreign investment, debt and capital markets, securitizations, structured finance, peer-to-peer lending, leveraged finance and general finance transactions, corporate governance and mergers and acquisitions.

He has advised financial institutions such as banks, foreign banks, investment advisers, brokerage houses and multiple object financial corporations (SOFOMs). He also advises entrepreneurs as well as publicly traded companies.

As part of his professional career, he serves on the board of director of several companies, private and publicly traded companies, both Mexican and transnational.