Hi MTJ,
We are involved in the training of
CP and HECPO to the KPS in Kosovo and to some of the UN High Risk Escort teams particularly in Mitrovica region.
With that most of the students on these courses are already serving UN cops. (CIVPOL) That comes as a matter of secondment from your home force and as such for the Kosovo mission it is open to Armed Police only, hence the UK contingent is made up from MOD police and previously RUC/PSNI.
For the EU secondments that is down to personal application and I am sure then upon offer of placement one needs to secure leave of absence or career break to attend as they are open to those serving currently. A lot of positions exist as police trainers to countries such as Bulgaria, Serbia (where we are involved in Riot Control) Montenegro , Albania etc.
If you are a trainer and have a skill that is required (CID Training is high on the list at present) you stand a very high chance.
In Iraq etc some of the PSC are doing the training , AG had the Iraq one but not sure if they still do , PAE has some but are mostly after US citizens and Dyncorp has many but again are after US Cits. Look around and if I can help you in any way let me know.