After graduating from Meer Uitgebreid Lager Onderwijs, comparable to junior high school, Ella obtained diplomas in bookkeeping, modern business administration, and introductory trade.

During her tenure as Minister of Finance, from 1993 to 1994, there was a quarrel between coalition members of the ruling government, which led to early elections and a shortened term.

[3] Despite this, she maintained firm control over government spending and for the first time in Aruba's status aparte period the country had a budget surplus.

[4] From 1994 to 2001, Tromp was a Member of the Parliament of Aruba and sat on the People's Electoral Movement party board.

Upon the resignation of Christina van den Berg-de Freitas on 1 September 2008, she was appointed as acting Governor of Aruba.