In most plants the 'corporate stuff' belong to IT and the plant process computers (and software) belong to Engineering. If you don't have an Engineering Degree, you don't play with the process computers. The OP has a network-type background and would likely only be allowed in the IT arena.
I am still trying to figure out how that is a 'blanket statement.' "In most plants" and "would likely" seem to be some pretty big holes for a blanket... maybe you meant a Snuggie
®. That is sort of like a blanket with holes added (or is that removed? Nah, has to be added because of the sleeves.)
As for the need for an Engineering degree -- anything that affects or may affect the reactor (particularly reactor power) requires an engineering degree of some sort. Process computers do that. So, you may not need the degree to write the code, but you do to ensure that the reactor is not adversely affected by what you write. Thus, process computer = engineer. And, yes that is a simplified description of a complex concept.
I seriously doubt anyone's feelings were hurt by your comment. But nukes are very intolerant of people that make statements or jump to conclusions based on a lack of knowledge of the subject at hand.
You are right that I am not an expert in process computers...