Peacock will take up his new role at West Ham after spending over 35 years with Charlton.
”He brings with him a wealth of experience and many lessons learned - good and bad - during his time with Charlton in the Premiership. That, combined with his knowledge and understanding of the game, will be a big asset to us I am sure.
”I would like to welcome Keith to Upton Park and look forward to the part he will play as we continue to progress and build in the Premiership.”