This is an old post but very interesting, thanks for digging it up again.
I'm a Mechanical Engineer too, I've worked at many companies over the past 28 years. Right now my title is a Senior Analytical Engineer (that means I'm old), I do a lot of stress, thermal, acoustical and fluid dynamics analysis. Regardless of my title I still run a milling machine, lathe and would much rather be welding than sitting at a desk.