The disappearance from New Zealand of my Great Uncle Lindo Huston Arthur.

Lindo had a two warrants out for his arrest in 1931 for not paying maintenance. After this time nothing turns up about him in NZ.
What is known is that he turns up in Sydney, the date and how is unknown. We know that he was a seaman aboard the RMS Tahiti which travelled between Wellington, San Francisco and Sydney in the 1920’s.
He served in the Australian Army Citizens Military Forces as a guard at Cowra. Number N279563.
He married a Mary Oldaker in 1942, and he died in 1960 and is buried in Liverpool Cemetery, Sydney.
Can anyone point me in the direction to find out what work he did in those missing years? When and how he got to Sydney?
I just keep hitting brick walls wherever I look and any help would be greatfully received.