We will use the sqlserver module, so you will need to have installed the latest version of SSMS from https://sqlps.io/dl
This code was run using PowerShell version 5 and will not work on Powershell version 3 or lower as it uses the where method.
Lets grab all of our jobs on the estate. (You will need to fill the $Servers variable with the names of your instances, maybe from a database or CMS or a text file)
One oddity with SQL Agent jobs is that you absolutely need to call the Alter() method at the end or else the changes will not actually take effect.