The president has voting powers as it is elected amongst the own members of the Senate as established by Article III of the Constitution of Puerto Rico.

The current president is Thomas Rivera Schatz, senator at-large from the New Progressive Party The president traces its history back to more than 108 years ago when the Jones–Shafroth Act formally established the post on March 2, 1917.

Said act was eventually superseded by another law, and the post was eventually established by the Constitution of Puerto Rico, specifically Article III, which establishes that, "The Senate shall elect a President [...] from among [its] members."

[1] Internal rules adopted by the Senate through a simple resolution establish its definition, functions, responsibilities, and legal scope.

[2] Typically the president is responsible for the observance and compliance of the Senate's internal rules.