Hi @rtraba,
Welcome to the community .
I had issues running Quorum on my computer today (due to some config issues with my environment) so haven't been able to test using oz transfer
.
I have previously deployed and interacted with a public contract on Quorum created using OpenZeppelin SDK, see the following topic:
There is an open issue to support private contracts: https://github.com/OpenZeppelin/openzeppelin-sdk/issues/1176
Also an open PR to add this support: https://github.com/OpenZeppelin/openzeppelin-sdk/pull/1188