How do I include within the same project suite

>This is a government application that used for creating missions. I need to be able to create multiple missions. code is the same except for the external data file.

This is a common usage of tests within a project. See the example here. I would set your tests up like the "webstore" example in the first screenshot. 

https://support.smartbear.com/testcomplete/docs/working-with/managing-projects/project-suites.html

>I need to be able to use different user roles so I need to close the browser in between logins.

That's not a problem. I see that in your test list.

>I don't want the browser to be included in the test project.

Do you mean that you don't want the browser to be hard coded in the test?

If you want to run the same dataset on each browser, then look at setting up cross-browser testing. This will be the easiest way.

https://support.smartbear.com/testcomplete/docs/app-testing/web/general/cross-browser/creating.html

If you want to run on different browsers depending on what the data is, then I would include the browser name in your data. You can then use that variable for opening and closing the browser.