Great video! I'm interested in environmental engineering and am trying to figure out which area to specialize in and your video provided a good overview of your specific field. I'm really curious about how much math/engineering is actually involved in your day-to-day work. Have you ever had to design a water treatment system? Can you give more specifics on what you do on a daily basis?
It certainly sounds like a good start. Different employers will want different credentials. To get an idea of what is common, check out some job listings and look at the requirements. indeed.com is a nice job listing site. Good luck!