How can we reassign the contracts to new contract administrator

Summary:

We have contracts where under fulfillment lines we are setting up the expiration notifications and here it is flowing to contract administrator if in case contract administrator resigns, how can we reassign it to new contract administrator as if we do manually it will take more time to update as the contract admin can have 100's of contracts under him.

Please provide us if there is any possible way for us to update it.

Content (please ensure you mask any confidential information):

We have contracts where under fulfillment lines we are setting up the expiration notifications and here it is flowing to contract administrator if in case contract administrator resigns, how can we reassign it to new contract administrator as if we do manually it will take more time to update as the contract admin can have 100's of contracts under him.