All right, I've done my research online, and everything I've read says Hermione went to back to Hogwarts for seventh year. Then she worked for the Department for the Regulation and Control of Magical Creatures. On the HP Wiki it says "briefly" but I could not find any reason why, ie a JKR statement. Then she went on to the Department of Magical Law Enforcement, where according to the HP Wiki she attained a high position.

So my question long do you suppose she stayed with the Dept. of R/C of Magical Creatures? A few years? Several years? Did she leave before she got married? After? Before kids? After kids?

I'm formulating half an idea here. I'd like to see Hermione working in the Department of R/C of Magical Creatures for 2-3 years before moving to the Department of Magical Law Enforcement. She's not married to Ron yet. Does that sound plausible? If so, I may have more questions...