Maria Antonia graduated with honors in Economics and Business Administration from the University of Genoa in February 1982. She worked at the Turin offices of the multinational audit firm Peat, Marwick & Mitchell (now KPMG) from 1982 to 1984. In 1984, she passed the exam for the qualification as a Chartered Accountant and joined the Order of Chartered Accountants of Asti.

In the same year, she founded the Vicarioli Pistone Studio together with Dr. Carlo Vicarioli, who soon became both her associate and spouse. Since then, She has consistently managed the section of the firm that handles accounting, financial statements, consultancy, tax declarations, and corporate transactions. This includes clients managed directly through their management system and external clients who independently handle the administration of their business entities, both in Italian and English to facilitate foreign clients.

From 1984 to the present, she has played a significant role in establishing numerous productive activities and contributing to the development of existing ones. She provides clients with support for growth, and is always available for advice or assistance in delicate or complicated situations in their business life.

She maintains relationships with the Tax Administration, Business Registers at the Chambers of Commerce, and Tax Commissions at every level, actively collaborating with professionals from other disciplines.