Guma Aguiar at the President's Jerusalem Conference. Guma L. Aguiar is a Brazilian-born Jewish-American-Israeli energy industrialist and millionaire businessperson who splits his time living between the United States and Israel. Guma Aguiar is recognized as a leading philanthropist who has supported a variety of Jewish causes including Nefesh B'Nefesh and the March of the Living. In July 2009, Aguiar invested over US$4 million in support of the Beitar Jerusalem Football Club.