Oxfam gave a “dignified exit” to Roland van Hauwermeiren, centre, after he admitted to using prostitutes. He went on to work for a French NGO

Oxfam failed to warn aid agencies about staff caught using prostitutes in earthquake-torn Haiti, allowing them to take jobs among vulnerable people in other disaster zones.

Roland van Hauwermeiren, 68, who was forced to resign as Haiti country director in 2011 after admitting having prostitutes visit his Oxfam villa, went on to become head of mission for Action Against Hunger in Bangladesh in 2012-14. The French charity made pre-employment checks but said that Oxfam “did not share with us any warning regarding [his] unethical conduct, the reasons of his resignation or the results of internal inquiry”.

A spokesman said: “Moreover, we received positive references from former Oxfam staff who worked with him, among them a [former] HR person.”

A Times investigation revealed yesterday that