Transfer material from one job to another

We are currently working on a job that has had so many changes it has
become a nightmare. Because it is linked to the Sales Order makes it
even harder to figure out how to manage it. We also have deliveries
linked together into three jobs. We have met all shipping
requirements for one job, but there is still material on it that we
need for the other two jobs. Does anyone have any suggestions how to
transfer that material from one job to the other?