As someone with a lot of large airline SMS experience I strongly recommend you do some data science work as well! A trap for many safety specialists is that they can list endless points of human factors but can't work out basic safety trends from their data, use basic statistics (Bayes, Poisson, Gaussian etc.) or they infer results incorrectly based upon erroneous safety data.
Here's a decent free course, just the first module will help you understand how to use safety data correctly (you have to select each course individually to avoid the fee):
https://www.coursera.org/learn/data-...o?source=cdpv2
After all there's no point being able to understand human factors if you can't apply it objectively using data as opposed to entirely subjective theory. All the airline SMS's are going data driven currently or will probably be co-erced into it over the next few years so if you want a job at the end this will definitely help.
A bit off what you were asking about though!