Unfortunately, the earlier poster is right about engineers. Years ago, I graduated from a top engineering program in the US and got into a dream job at one of the foremost research labs in the world (owned by a huge company). After a few years of really hard work, I got completely stuck at Senior Researcher. The only step up was Research Manager, which meant giving up the technical work if I wanted more pay. Being in engineering really sucks pay wise at large firms if you want to stay technical.

Anyway story ends well as I used my math ability to get a job on Wall Street and worked like a mad dog 24 hours a day. Eventually relocated back to Singapore as the head of a department.