After a start in the financial world, Roseport soon moved on to the advertising sector, where he was Creative Director in several advertising agencies including Ted Bates, DMB&B, McCann Erickson, Young & Rubicam and Brandlab. For three years he was WW Creative Director at Filmnet Pay-TV (Nethold/Canal +/Richemont Group).
He worked closely with professional photographers and directors in the Benelux and abroad, got inspired by the work they did and learned from them on the sets.