The government of the Marshall Islands operates under a mixed parliamentary-presidential system as set forth in its 1979 Constitution. Elections are held every four years in universal suffrage (for all citizens above 18), with each of the twenty-four constituencies electing one or more representatives (senators) to the lower house of RMI’s unicameral legislature, the Nitijela. (Majuro, the capital atoll, elects five senators.) The President, who is head of state as well as head of government, is elected by the 33 senators of the Nitijela. Four of the five Marshallese presidents who have been elected since the Constitution was adopted in 1979 have been traditional paramount chiefs.

Former President Hilda Heine with Taiwan President Tsai Ing-wen in October 2017
In January 2016, senator Hilda Heine was elected by Parliament as the first female president of the Marshall Islands; previous president Casten Nemra lost office after serving two weeks in a vote of no confidence.
https://en.wikipedia.org/wiki/Marshall_Islands