temporary staff recruitment agency; employment agency
temporary employee (esp. from an agency); temporary worker; agency temp
temporary employee placement
disaster relief operation; disaster relief mission
overseas dispatch (e.g. of the Japan Self-Defense Forces)
temporary worker (dispatched from an agency); dispatched worker
temporary labor; dispatch work
Self-Defense Force mission; Self-Defense Force dispatch
Act for Securing the Proper Operation of Worker Dispatching Undertakings and Improved Working Conditions for Dispatched Workers
reporter posted to another location (city, country, etc.); reporter on assignment
temporary staff; loaned staff (e.g. from a parent or related organization)
manpower business; manpower agency