Log on to the Tetra Tech Benefits Site at digital.alight.com/tetratech or the Alight Mobile app (available through the Apple App Store or Google Play) to enroll in your benefits for 2024. Logging on for the first time? From the Tetra Tech Benefits Site, register as a new user and follow the prompts to provide requested information and set up your username and password. Following your enrollment, you may still need to take action. If you do, the required follow-ups will appear on a confirmation page. There are also things you should do to set yourself up for success after you enroll. Questions? Once logged on to the Tetra Tech Benefits Site at digital.alight.com/tetratech, look for the “Need Help?” icon to ask Lisa, your virtual assistant, any questions you may have. Lisa can also connect you with a web chat representative and other helpful resources. For additional support, you can schedule an appointment with a customer service representative through the Tetra Tech Benefits Site. You can also call the Tetra Tech Benefits Resource Center at 1.833.900.2969 from 7:00 a.m. to 4:00 p.m. Pacific Time Monday through Friday. Back to top