Former Everton scout Henry was brought into the West Ham fold in 2014, and he has been responsible for helping in the signings of a number of players since then.
“I chose Tony to help with player recruitment because I thought Everton had a good track record of buying players,” Sullivan told West Ham’s official website. “They bought the right-back Seamus Coleman for £60,000.
“They bought John Stones for £3m two years ago. This summer they were talking about £35-38m for him.
“I also went for Tony because he offered me Ronaldo for £6m at Birmingham about 12 years ago. Just before he went to Man United.”
West Ham have recruited shrewdly over the past couple of years or so, and they are a better team for it.
2014 summer signings Aaron Cresswell, Enner Valencia and Diafra Sakho have been successful, while the likes of Dimitri Payet, Victor Moses (on loan from Chelsea) and Manuel Lanzini (on loan from Al Jazira Club) - who arrived at the Boleyn Ground in the summer of 2015 - are doing well at the moment.
West Ham cannot compete with the likes of Manchester United, Manchester City and Chelsea for big-money signings, which means that a good scouting system is hugely important.
Henry has a fine track record of getting good players who often go unnoticed, and the Hammers are in a better shape on the pitch because of his presence.