Benson was born in Guildford, Surrey, and was named after European golfing legend Seve Ballesteros.

Benson claimed his first professional win in May 2008 at the opening event of the PGA EuroPro Tour season.

Later the same month he won for the first time on the Challenge Tour, at the Piemonte Open, where he set a new course record in the 3rd round.

He also won the Ypsilon Golf Challenge in August, where he triumphed in a playoff, and finished 6th on the end of season money list, to graduate to the European Tour for 2009.

After suffering injury in 2010, he played 2011 on a medical exemption, but was unable to retain his card and returned to the Challenge Tour.