Best Career Choice?

I recently took Ordinary Differential Equations and loved the course. I would to do something like that for the rest of my life but I don’t know which career would best suit this. Could anyone help me or give me any suggestions on what career uses the most differential equation material?

Electrical Engineering uses a lot of ODE’s to model circuits. The various areas of Mechanical Engineering are based on different PDE’s (Partial Differential Eqns.). Think ODE but with multiple independent variables like spatial dimensions x,y,z and/or time).