 He remained the chairman of the board of trustees until his resignation on August 6, 2009, to campaign for his 2009 gubernatorial run.Under Guerrero, the board of trustees filed a lawsuit against Governor Benigno Fitial's asministration in a dispute over employer contributions.A court later ruled that the government of the Northern Mariana Islands owed the NMI Retirement Fund $231.6 million in employer contributions.