It's interesting to hear you say it's only pursuing if it's relationship stuff. I didn't realize that, actually.
For the most part. If, however, he perceives that you are USING another topic (like his work, or the kids, or some other "go-to" move) as a way to pull him back into talking more with you, then it COULD be perceived by him as pursuit. But if you are legitimately interested in how his job is going, and especially if you ask him about it NOT at the end of some panicky "dry spell" in which you haven't heard from him in awhile, or when he's not responding to your texts or something . . . you just do it maybe right after you already WERE talking or texting or emailing about something else . . . then I think that would be good.