The Server Enterprise Edition execution environment is built on top of the Micro Focus Enterprise Server technology that provides the infrastructure not just for executing COBOL, CICS, IMS, DB2, VSAM and JCL, but also for deploying existing transactions as Web Services for easier re-use within new architectures like .NET, J2EE or SOA.
JCL applications written to run on a z/OS or VSE mainframe can be run with the Server Enterprise Edition environment. You maintain the applications in Visual Studio.
You can maintain your JCL files on the PC using any text editor.