Lots of professions have this. Pilots say it. Police in tough areas have a tough job, no way around it. Does it kill you a lot earlier after you retire? On average, it doesn't look like it. Why pilots say it, I don't know, but a lot of people like to claim their job is so taxing that it causes them to die early (talking about other professions now, not particularly police). Anyway, going to actual data, American pilots actually proved to live longer in retirement than the average male.
http://flightsafety.org/hf/hf_jan-feb96.pdf
The best one I've heard so far is broadcast engineers. A retired broadcast engineer told me the average broadcast engineer lives only one year past retirement because they get fried by microwaves. He was a decade into retirement, though. There may be some truth to shortened lifespan for someone fried by microwaves their whole life, or it might be the same life span with more illness due to microwaves, I don't know. I know for sure that there is no natural mortality pattern that allows people to live to retirement and somehow become deceased 1 year after retirement. If it was accurate, broadcast engineers of all ages would be dying on the job instead, and safety rules would've been changed.
Things that will shorten your lifespan:
* obesity
* diabetes and complications from
* smoking
* refusal to go to the doctor
* lack of money for health coverage
There are definitely some trade groups that have (at least in my data) higher mortality than the average population, but it is not a great difference. It's more along the lines of a year or two after age 65 on average (i.e., the average retiree at age 65 may live to age 82 instead of age 84).
Now, if you'll excuse me, I have to get back to my job of eating the last hostess donuts I cold find and sniffing asbestos fibers.