Employment Opportunities. These are the different ways you can apply for a job with Williamson County Government. Apply in person at the Administrative Complex in the HR Department. (615)-786-0192. Download an application on line and mail it to : Human Resources 1320 West Main Street, Suite #112 Franklin, TN 37064, or you may fax it to us at (615) 591-8520. Apply online. Please select the position you would like to apply for and click on the Appl...