I am somebody who doesn't believe somebody can be "overeducated". Here is a true story...
A friend and co-worker of mine came into the nuclear industry with a masters in nuclear engineering. He started the business about 14 years ago as an Aux Operator. Most of the rest of us who worked with him were ex-Navy or had some similar practical experience. This guy, however, did not, but was willing to learn, and of course, was smart enough to do the job and also had good practical sense. He did not flaunt his educational advantage, and was certainly willing to "do his time". Aux Operator (which, as you probably know, is the entry level in nuclear operations) also pays very well, so this guy never felt like he was wasting his time. After a few years, he moved up and got his SRO license. Now he is a Shift Manager, and is poised to move up through company management. This guy is probably going right to the top; there is no limit, and he's only in his mid-thirties now.
Average starting pay for Aux Operator is very competetive ---- varies from location to location and is highly overtime dependent. But, once qualified, an AO can expect to earn from about 65K to 120K yearly gross. At many plants, this is a bargaining unit position. Job duties: have to be willing to do the "grunt work". No prima donnas allowed. It includes all plant operations outside the Control Room --- taking readings, rounds, operating equipment. Some physical prowess needed. Can expect to sweat most days, especially in the summer. Advancement choices: unlimited in the nuclear field. Best place to start, whether goal is to move up in plant management, engineering, or dozens of other areas.