Change the package security to "EcryptSensitiveWithPassword". Click on an open area of the ssis control flow tab and then go to the Properties window. There is a section for package security in that properties window. Set this password to something you can provide the admin.
When the admin creates the job to execute this package, have him use the File System option. He will then browse to the .dtsx file. After selecting the file, have him click on the "Command Line" tab of the SSIS job step. He will be prompted for the package password. Have him enter it, and that should allow the SSIS package to run as a job.
That's the relatively quick fix. I would recommend looking up "SQL Server Deployment" and utilizing the Deployment Utility" for SSIS. There is a lot of stuff to learn and figure out.
Let me know if that info helps or if you need more help.