[5] In September 2007, Aimo was appointed Minister for Correctional Services as part of Michael Somare's post-election reshuffle.
[6] His first year in the role saw refurbishment work on five prisons, reviving of promotion within the correctional services department, the implementation of an equal opportunity policy, and recruiting more than 200 warders.
[9][10] Aimo publicly blamed the broader government for the breakout, claiming that security had been compromised due to "insufficient funding for manpower and upgrades", and suggested that Papua New Guinea's prisons were outdated and needed to be replaced to meet modern requirements.
[16][17] Aimo was reported to have been one of 48 MPs to defect from the government and elect Opposition Leader Peter O'Neill as prime minister in August 2011.
[22][23] He filed an election petition challenging the result two weeks later, alleging that Anisi was under the constitutional minimum age of 25 and that his name was not on the Common Roll.