On television, Jumbo has appeared in My Family, Harley Street, as receptionist Hannah Fellows, as Lois Habiba in all five episodes of Torchwood: Children of Earth, as Becky on BBC Three's drama series Lip Service, Casualty and as Nurse Damaris in Getting On Series 2 and 3, written by Jo Brand, Jo Scanlon and Vicki Pepperdine in which she was directed by fellow Torchwood actor Peter Capaldi. She appeared as DC Bethany Whelan in series 2 of ITV's Vera starring Brenda Blethyn and returned to the show for series 5, broadcast in 2015, and for episode 1 of series 6 in 2016. She has also appeared several times on BBC Radio 4 in dramas and as a guest on the panel show Dilemma. She became a regular cast member in the 2015–2016 season of the CBS series The Good Wife until the series ended in 2016. She reprised her role in the series' spinoff The Good Fight.