The article says you know your ambition is from God if "it gives glory to God," it "helps others," and seems "bigger than you can accomplish." Well, I suppose. I'm not sure how being a plumber gives glory to God, but I'm sure grateful they're around. As far as helping others, I find the best thing for me personally is just to stay out of their way. They're usually better off, and I don't have to put on pants. And pretty much everything seems "bigger than I can accomplish" on Monday morning. For that matter, eating an entire "EMT Special" at Daddy D's Barbecue seems bigger than I can accomplish, and so far it has been. But with the Lord's help, one day I will do it. Glory to God.
I believe the article means well, but it stops after only three points. There are a lot more specific ways to be certain your personal career path dovetails with what the Creator wants for you.
For example, is the personnel director or guidance counselor a burning bush? That's pretty much a tip-off right there. If you're walking along and a burning bush tells you the world needs another hedge-fund manager, you'd do well to take that seriously. Thunderclouds are another one. Have you ever gotten career advice from a thundercloud? If so, don't ignore it.
If you try doing something else, does a whale swallow you? Say you leave your job as an accounts manager and go to work as a medical equipment salesman. But then, on your way to your new job, a whale swallows you, and when it spits you out, you're right back at your old office. I know, you'll say it's probably just a coincidence, but still maybe you ought to rethink your career change.
You're told to conquer Hittites. So far as I know, the only person who ever said, go out and conquer the Hittites was God, so if conquering Hittites is in your job description, then that's probably a smart move, career-wise. Ditto for conquering Jebusites, Ninevites, Canaanites, and Philistines.
Does the health-care package include resurrection after death? Major medical and dental is fine, but if there's an HMO that says you'll actually come back from the dead, that might be a pretty sweet deal. Even if there's like a three-day waiting period. Of course, you got to be careful with that one. Maybe this has something to do with God, or maybe it's just an ordinary zombie uprising sort of thing, so you need to inquire more carefully. Will this entail eating human brains or will you just be taken up into heaven? These small distinctions can make all the difference between fulfilling God's will and being just another pesky undead.