Well actually there are specialist engineering courses for medics. Mainly run by Bio engineering university units round the country. Some medics do them as a Phd in bio engineering and others do them as a MSc.
FEA is used alot in orthopedic implants.
You start off with this.
Then you test it with this.
Bio engineering FEA is a bit of a bitch to be honest though. Virtually all the material properties are non-linear and every bone is different. For all its challanges it also is bloody good fun. I think mainly because you have to verify by experiment then loop back to regig your engineering and then try it again.
And medics especially surgeons who have engineering savy can make a whole heap of money. I met a ortho surgeon who also had a full BEng who had been told that it was a bit late in life etc to be studying medcine, but he was banging out the patents much to the disgust of all his consultants. They were very good designs as well with high success rates and minimal fannying around getting them approved. He apparently was **** hot with a knife hammer and power tools in theater as well.
Then you get into replacement limbs and stump grips etc. Not as much money in it but they all seem to have a good time of it with alot of job statisfaction getting a better quality of life for the person.
One of the medics at Gatwick is right into his modifcation engineering to aircraft for disabled pilots.