I am a Minerals Processing Engineer. I work for myself (well technically a corporation owned by my wife and myself). I get paid to perform various engineering functions. One of those functions is to determine heat transfer in systems. What I do either works or I get sued.
Yes, I have indeed done work for BIG OIL!!! I once spent (I think, as it was about 4 years ago now) about 200 billable hours looking at alternatives for tailings deposition in the tar sands.
Mostly I work for gold and copper mining companies. Some of my work is NI-43-101 compliant. If you are a climate scientist, I DARE you to meet those standards.