An exchange officer is a commissioned officer in a country's armed forces who is temporarily seconded either to a unit of the armed forces of another country or to another branch of the armed forces of their own country.[1][2]
The exchange officer will usually perform all duties as if he or she were actually in the armed forces to which they are attached. This includes going to war, if required, although for international exchange officers this generally requires that permission be granted from their home government, and that other conditions may be attached. The stated purpose of an exchange officer programme is usually to help foster understanding of each other's operating methods. This provides valuable feedback so that any issues that crop up in joint operations, such as those done under NATO, would not impede the achievement of mission objectives. Exchange officers usually serve in similar roles to those that their career path would take if they were to remain in the armed forces of their home state.
As part of NATO interoperability of the UK/NL landing force the Netherlands Marine Corps (Korps Mariniers) regularly carry out an exchange program with their British Royal Marines counterparts, this acts to increase integration within this joint force whilst also continuing the close relationship between the two Corps.