What diagnosis have you performed so far? Have you checked the ECM for codes? That's the first thing I would check.
I've also seen this scenario happen when the key loses its registration to the computer. The engine will turn over but the ignition won't function. This can be common with non factory keys or if there is only one key registered in memory.
2016 Jeep Wrangler Unlimited Rubicon Hard Rock: Factory Ordered Rhino, Auto, 4:10, Max Tow
Added: Front GraBars (Thanks AOR!), MOPAR Door Sill Plates, Griffin Steering Attenuator