...health and safety....
Depending on how deeply you wish to get into the health, safety and epidemiological part of it all, you may wish to consider a Master of Public Health (MPH) program in environmental/occupational health or emergency management in lieu of (or in addition to) the MSc.
Perhaps a touch of personal bias, but considering that I did my undergraduate work with a double major in biology and psych, this was simply a natural progression for me.