After commissioning in 1974, Mengga served in cavalry and territorial commands, including company and battalion leadership within
Kodam XIV/Hasanuddin and
Kodam IV/Diponegoro, as well as staff and instructional posts. Transitioning to politics, Mengga was elected to the
House of Representatives in the 2009 legislative election for the West Sulawesi constituency with the
Democratic Party, serving on Commission I which oversees defense, foreign affairs and information. He won reelection for the 2014 to 2019 term but resigned on 19 December 2016, after which his seat was filled through the parliament's replacement mechanism. In the 2024 regional elections he ran as deputy to
Suhardi Duka in the West Sulawesi ticket, and the pair were sworn in at the State Palace on 20 February 2025 for the 2025 to 2030 term. As vice-governor, he drew on his military and parliamentary background to support provincial administration before dying in office in
Makassar on 31 January 2026, with burial arranged at the
Kalibata Heroes Cemetery in Jakarta. == References ==