In 1991, Dixon started as a copy boy in the newsroom of BBC Radio Scotland, moving onto typing up stories from reporters and correspondents and helping out on location.
Dixon joined Radio Clyde in Glasgow as a Production Assistant in 1993 and in the same year worked as a researcher on the BBC quiz show Catchword.
Dixon started with Scottish Television (STV) as a Promotions Director in 1995 where he scripted, edited, voiced and directed on-air promotional material, and also voiced live continuity announcements. During this time he created a Formula One news website – which won a BBC web award.
1999 marked the beginning of Dixon's time with Scottish Television's flagship news programme Scotland Today, starting as a production journalist. During his seven years at the station, he presented news bulletins, the weekend and late news, and also the main evening programme. Dixon reported on news items such as the Maryhill gas explosion, the Tsunami appeal, the opening of the Scottish Parliament and the Edinburgh Festival.
Dixon has also produced and presented a documentary on STV entitled Archie McLean: The Forgotten Father of Brazilian Football.
Moving to London in July 2005, Dixon joined GMTV as a news producer. He was promoted to reporter in November 2005 and during his first week on the job reported live from the Paris riots on the Champs-Élysées. Dixon reported live from Times Square, New York on David Blaine's world record attempt in May 2006. He was also a relief newsreader on GMTV.
In September 2010, Dixon transferred to ITV Breakfast programme Daybreak as New York correspondent. From July 2011 until April 2014, he was a Features correspondent, based in London. In April 2014, Daybreak was axed to make way for a new ITV Breakfast programme called Good Morning Britain for which Dixon is a news correspondent.