keep on top of (someone or something)

1. To remain completely in control of, knowledgeable about, or on schedule with something. A: "How is the new project going?" B: "Right on track! Jen has been keeping on top of everything while you were on vacation." I don't know how you keep on top of all the different issues that students bring to your attention.

2. To ensure that someone remains organized, on task, or under control. How Janet manages to keep on top of all eight of those kids is really beyond me. You've got to keep on top of your employees if you want your business to run smoothly.