Jacob Nena is a Micronesian

Federated States of Micronesia

The Federated States of Micronesia or FSM is an independent, sovereign island nation, made up of four states from west to east: Yap, Chuuk, Pohnpei and Kosrae. It comprises approximately 607 islands with c...

 political figure who served as the fourth President of the Federated States of Micronesia

President of the Federated States of Micronesia

The following is a list of the Presidents of the Federated States of Micronesia:-See also:*High Commissioner of the Trust Territory of the Pacific Islands...

 from 1996 to 1999. He had served as Vice President

Vice President of the Federated States of Micronesia

Vice President of Federated States of Micronesia is the second highest position in Federated States of Micronesia.History of the office holders follows...

 under Bailey Olter

Bailey Olter

Bailey Olter was a Micronesian political figure. He served as Vice President of the Federated States of Micronesia from 1983 to 1987 and as the third president of the Federated States of Micronesia from 1991 to 1996...

; after Olter suffered a stroke in July 1996, Nena took over as acting president on November 8 of that year and was sworn in as president on May 8, 1997, serving out the remaining two years of Olter's term.
Before becoming vice president and president, Nena served as Governor of Kosrae

Governor of Kosrae

The office of the Governor of Kosrae is the highest position in the state of Kosrae, Federated States of Micronesia.History of the office holders follows...

from 1979 to 1983.