Manus Provincial Police Commander, Chief Inspector David Yapu, said Terry Shane Geddes, of Woodside, Brisbane, allegedly squeezed and grabbed the buttocks of the female attendant at Seadler Bay Hotel on March 21.
A report of the sexual harassment was put to the management of Paladin Security Company but no action was taken.
She later laid a complaint with police on April 3.
PPC Yapu directed for CID investigations into the allegation which led to his arrest over sexual touching.
He also said there is also another allegation of similar incident by another victim who is yet to be located by Police and interviewed before Police could proceed to lay another charge against Geddes.
His passport is in police custody and he is expected to appear in Lorengau Committal Court on Monday.
In light of this incident, PPC Yapu raised concerns that expatriate men coming into the country for work must abide by PNG laws.
He said sexual harassment at work place is a serious criminal offence under PNG laws.
This is not the first time expatriates working in Manus have breached PNG laws.
In 2014, a murder took place at the old Regional Processing center in Lombrum, where two locals were sentenced over the murder, whilst the other expatriates implicated in the incident were flown out before they could be arrested.