In 1994, she played eccentric secretary Rosie McConnichy in the final series of BBC comedy May to December, as a replacement for the character of secretary Hilary (Rebecca Lacey), and Heather in Roughnecks, a BBC television series about workers on a North Sea oil platform.

Jensen had a small role in a Dangerfield episode "Contact" as the mother of a young girl with meningitis.

Jensen co-starred alongside Ricky Gervais in the BBC Two/HBO television programme Extras as the socially inept Maggie Jacobs.

Production of Ugly Betty moved to New York from Los Angeles in mid-2008, causing a conflict for Jensen, who was unable to relocate from Los Angeles and left the show in 2009 near the end of the third season but made a return guest appearance in 2010 during the fourth season.

as Jennifer Lore, a Hollywood producer's secretary and the love interest of Paul Maddens, played by Martin Freeman.

On 21 December 2010, she starred in the one-off/pilot BBC comedy drama Accidental Farmer, playing a London executive who buys a derelict farm with her philandering boyfriend's credit card.

In 2014, she played the eponymous lead character in the television film adaptation of the M. C. Beaton novel Agatha Raisin and the Quiche of Death for Sky1.

When an injured soldier discovers patients in his hospital ward dying, he attempts to investigate the suspicious deaths.

She has one son[9][10] from her marriage to actor Terence Beesley, whom she met in 1999 while working on a stage production of King Lear.