Gingras attended Yale University from 2000 to 2004, graduating with a Bachelor's degree in American studies and a concentration in sociology. At Yale, Gingras played basketball as the starting point guard for the Yale Bulldogs and served as captain her senior year. 
She began her career in journalism as a CBS News production assistant in New York. Brynn's coverage over her career has earned her an Edward R. Murrow Award, a National Emmy and three Regional Emmys.  
She joined CNN in March 2016, she's reported on the Orlando nightclub shooting, the 2016 presidential election, the aftermath of international terrorist attacks and the historic flooding in West Virginia.