I consider myself fortunate that I spent three years working at 7,775 feet before spending five years working at 13,796 feet on the summit of Mauna Kea. I can only wonder how much more severe my long term very high altitude sickness could have been without the initial adaptation to the lower altitude.

Working at high altitudes is known to aggravate underlying health issues in sea level adapted humans.

Working in professional astronomy was an absolute disaster for my long term health.

When your manager tells you the published company health and safety policies are bogus and not to follow them, you know that you are working for a very shady company.

I made the mistake of working at the world's largest telescopes and now show classic health degradation that is associated with that biologically toxic environment.

Avoid working in windowless environments for good health.

If you are looking for a career that may induce a myriad of health conditions into you, I can recommend working at the 13,796 feet very high altitude summit of Mauna Kea, Hawaii, USA.

After a decade of working in high altitude astronomy the medical profession discovered that I had a hole in my heart, erratic low blood oxygen levels and brain issues. Heart, lung and brain problems appear to be long term known adverse health aspects of high altitude work and unnatural electromagnetic radiation exposures.

When I worked in astronomy, I routinely observed young college and university students working with liquid nitrogen and breathing nitrogen gas as they discharged it into the indoor environment at high altitude.