I don't know if this link will work:

https://www.familysearch.org/search/recordDetails/show?uri=h...

If it doesn't go to http://www.familysearch.org and choose the updated version of the site. Put in James Gregg, marriage, Montana. That should bring up the page with a link to view the original marriage license.

I don't think that you can get employment information through social security records, but that's something I've never tried to do.