On 6 April 2023, Mennenga signed a two-year deal with the
Cairns Taipans of the Australian
National Basketball League (NBL). He averaged 6.9 points and 3.9 rebounds across 27 games in the
2023–24 season. Following the NBL season, he joined Greek club
AS Karditsas, where he averaged 7.3 points and 3.7 rebounds in nine games. On 15 March 2024, Mennenga was granted a release from the second year of his contract by the Taipans in order for him to return home. On 16 January 2025, he scored a career-high 29 points in an 85–75 win over the
Tasmania JackJumpers. Mennenga joined
Atléticos de San Germán of the
Baloncesto Superior Nacional for the
2025 season. He averaged 14.5 points and 6.8 rebounds per game. He subsequently joined the
Los Angeles Lakers for the
2025 NBA Summer League. On 24 January 2026, he was ruled out for six to eight weeks after suffering a broken wrist the previous night in a loss to the
Adelaide 36ers. After a quick recovery, he returned for the Breakers' final regular season game on 19 February, scoring a career-high 32 points in a 115–84 win over the Taipans. The Breakers finished outside the finals spots in seventh at the end of the regular season but won the inaugural
NBL Ignite Cup Final, defeating the 36ers 111–107 behind Mennenga's 21 points. Following the 2025–26 NBL season, Mennenga joined the
Xinjiang Flying Tigers of the
Chinese Basketball Association (CBA). On 24 March 2026, Mennenga re-signed with the Breakers on a two-year deal. ==National team career==