What role gives permission to change the Model Options for an Application?

I am the technical contact for an Application and can set Model Options for the Acceptance or Production Environments. I want to grant the ability to another developer so they can turn on or off scheduled events. What role allows access to Model Options?    I’ve granted the developer all the permissions checkboxes, but he still doesn’t have access to the Model Options page for our app.    Thanks for your help.
1 answers

I suggest to add one more technical contact.  Anyway, its tracked who did what.