The 27-year-old former Arsenal defensive midfielder joined West Ham on a season-long loan deal from Spanish powerhouse Barcelona on transfer deadline day.
Jack Sullivan is delighted that West Ham could secure the services of the former Cameroon international and has underlined his importance to the team.
“I am thrilled that we were able to do a deal to bring Alex Song back to the club,” he wrote on West Ham’s official website. “There is every chance he will be back to the player he was in the first half of last season.
“Even though he is injured at the moment, we still wanted to sign him and that shows how much we rate him.
“You can learn a lot from someone like him as he has played at the highest level and has Champions League experience.
“He can teach the other players and I'm sure the youngsters in the squad will be looking up to someone like him.
“He can pass the ball and open up defences and there are not many better than him. A big signing like Song shows the Club is heading in the right direction.”
Alex Song stats
Song was brilliant for West Ham in the first half of last season, but he struggled to maintain the high standards in the second half.
The former Bastia defensive midfielder created 28 chances in as many Premier League games during the 2014-15 campaign.
The Barcelona-owned man had a pass accuracy of 76% and a shot accuracy of 17%, and won 17 headers, 39 dribbles and 73 tackles.