In the side menu click Events & Competition > Team Events.
Find an upcoming meet in the list and click Job Signup.
Check the boxes by jobs you will work. Be careful not to pick conflicting times!
In the popup box, optionally enter any contact information, such as your phone number, or if someone else will be doing the job, their name and number, and click Sign Up.
If you accidentally signup for the wrong job, or later discover you can't work a job, select the job and click Remove Signup. You can do this up until 11:59pm of the Job Signup Deadline at the top of the page.
You may click Print My Job Signup Summary near the top for a handy reference of all the jobs you signed up for.