[4] Mahon began her career as a technology consultant with Mitchell Madison Group.
[5][4] In 2005, when working for Talkback Thames, Management Today included Mahon in their top 35 women under 35 in the business world.
[2][6] She has worked with the UK's Department of Culture, Media and Sport (DCMS), as a member of their advisory panel on the BBC's future direction.
[2] Mahon's appointment as CEO of Channel 4 was announced in June 2017 and became effective the following October.
[1][3] Mahon is married to Richard Barker, who works in renewable energy; the couple have four children.