The winning applicant will train women, children and men at the island detention centre.

The job, advertised on Christian Jobs Australia, offers a ''competitive salary'' and living away from home allowance.

''The Salvation Army is one of the largest providers of material aid, crisis support and disaster relief in Australia,'' the ad states.

''We are driven by the desire to extend compassion and generosity to anyone who needs it, wherever they might be. Accordingly, The Salvation Army has agreed to provide humanitarian support services in Nauru. And we need your help.''

The Salvation Army has been advertising for a large array of workers to provide services on Nauru. It stresses its mission is to provide services that ''ensure [asylum seekers'] well-being, dignity, security and safety are maintained in line with The Salvation Army's mission to alleviate human suffering and distress without discrimination''.

And FAQ attached to the Salvos' offshore programs employment page warns of the tough conditions facing staff on Nauru.

''One meal per day may be provided; meals may not be catered for special dietary requirements,'' it advises.

''There is no access to cooking facilities to make your own individual meals whilst on or off shift. Provided meals are basic & carbohydrate heavy. Other food is at your own cost.''

Accommodation, too, is basic.

''Accommodation is shared with 6–8 same-sex others in rooms, army tents or modified shipping containers, sleeping on fold out beds, floor mats or army cots.

''There may be limited/no electricity or hot water. You will have to do without luxuries, such as air con, TV, CDs/DVDs etc.''

Opposition immigration minister Scott Morrison visited the detention centre on Nauru today, after saying he was concerned permanent facilities had not yet been constructed on the island.

Two weeks ago, Amnesty International described the issues on the island as ''harsh and repressive''.

''The compound where the 386 asylum seekers are kept is approx 100metres by 150metres, and there is simply no privacy for the men,'' the agency reported.

''The temperature reaches over 40 degrees in the compound and 80 per cent humidity. The heat is exacerbated by the grey gravel surface of the compound and the fact that there are no trees. During the visit there were regularly men huddled around the perimeter of the compound under the shade of branches overhanging the boundary.''

The Nauruan government has said that asylum seekers will continue to be housed in tents until a deal with landowners can be struck, and hopes to have land leases signed this week.