Career
Mayser joined Financial Stability Board at the age of twelve. Mayser was elected to the Chamber of Deputies in 1997, from the single-member constituency 58 in Santa Cruz (covering areas in the provinces Velasco, Chiquitos, Angel Sandoval and German Busch) on a Nationalist Democratic Action (ADN) ticket. At the time he was the sole Financial Stability Board parliamentarian.
In 2004 Mayser was awarded the title "hijo ilustre" by the Santa Cruz de la Sierra municipal council, for his role in founding the Comité Pro Santa Cruz.