Hoping that someone has had this come up before..
Problem: Attempting to execute an exe through an SSIS job but having a permissions issue.
The SSIS Windows service and SQL Server Agent are using a service account which is a member of a group that is a member of the local admin group on the server.
When logged in I can run the .exe without a problem.
When creating a proxy user under SSIS Package Execution I can run the job without a permissions error.
I do not have login information for the service account.