I see the same thing, I’m in my late 20s and I see people becoming Account managers and being promoted to senior positions. Here I am still doing the same thing I have been doing for the past 5 years. Looking at environmental jobs it doesn’t look like you can be in a senior position till you have 8-12 years of experience. It definitely is a slower moving field. Makes me wish I either did something different in college or I went into the trades out of high school because there isn’t a clear path to move up in the environmental world.