This job is definitely not for everyone.
Close protection medics are assigned to a 'client' this may be an individual or a small group of people. Their primary role is protection, secondary is medic.
Most people who go into this are normally ex-forces as they have the solid base of knowledge regarding all things military.
CP Medics normally work in unstable areas of the world ad unlike their colleagues in the armed forces who have a huge support system in their base of operations, the CP Medics are often isolated and rely on contacts made locally and their understanding of the situation they are in and the best way to get out of it. Sometimes they do have help from coalition forces but often not.
In the past 10 years there has been an increase in the number of CP Medics who do not come from a military background. Some are young and adapt well to their newly chosen career, but some are much older and they haven't faired quite as well.
I am not a CP Medic but I know a few who are and will ask them to re-write the above to give everyone a better understanding of the role.