Foster se hizo un nombre cubriendo la crisis financiera asiática y, a la edad de 24 años, comenzó a organizarInforme de negocios mundiales (BBC World Service) .

También presentó las noticias de negocios y Breakfast Briefing junto a Moira Stuart.

En 2005, Foster se unió a CNN International como Business Anchor y corresponsal con sede en Londres.

Foster siguió el desarrollo temprano del movimiento de arte callejero al informar sobre Banksy y Adam Neate.

In April 2009, Foster moved to European primetime where he interviewed all living Prime Ministers of the United Kingdom; other Prime Ministers including those of Iraq, Sweden and Haiti the presidents of the European Commission, Georgia and the Maldives; business leaders including Bill Gates, Alan Mulally, Jack Dorsey, Bob Dudley and Steve Jobs; and celebrities like Dolly Parton, Diddy, Keith Richards, Michael Cain, Carrie Underwood, Amitabh Bachchan and George Lucas.

In it, he discussed news coverage with notable guests including Emma Thompson, P. J. O'Rourke and the photojournalist Tim Hetherington shortly before he was killed in Libya.

In 2012 he interviewed Queen Margrethe II[53] to mark her 40th jubilee (described as "remarkable" by The Times - 14th Jan 2012).