There's a great script in the MS Script Gallery, [Get-ScheduledTasks][1] (note the S on the end of the service name).  This works on older versions of Windows going back to Windows Server 2003 / Windows XP.

Thanks to the amazing Warren F (aka Rambling Cookie Monster) for creating & sharing this.


  [1]: https://gallery.technet.microsoft.com/scriptcenter/Get-ScheduledTasks-Get-d2207def