Welcome to Sigma Sigma Sigma's Recruitment Facebook Application. This is the place where you can learn more about how to join Tri Sigma and get involved. Click on the links to get started, check back often for updates, and invite your friends! It’s easy to sign up for Tri Sigma’s recruitment process. If you’re logged into Facebook, simply click, “connect with Facebook” and sign up, or create an account by providing your name and email address. We can’t wait to meet you!