Beard, who has been in charge of the club since they became professional in the summer of 2018 and led the Hammers to the FA Cup final in 2019, left by mutual consent, the club have said.
Goalkeeping coach Billy Stewart and first-team coach Paul McHugh have taken charge on a temporary basis while West Ham move to appoint a replacement for Beard.
“I have thoroughly enjoyed every minute of my time with West Ham United and, while I am sad to depart, I am proud of the work we have done to grow and develop this team,” Beard said.
“Although I am leaving, I do so with some wonderful memories that I will forever treasure, and I would like to thank Jack Sullivan and everyone at the club for the opportunity to work at West Ham United.”
Jack Sullivan, women’s managing director and son of West Ham co-owner David Sullivan, said: “On behalf of everyone at West Ham United, I would like to say thank you to Matt for his hard work and dedication during his time with the Club.
“Our growth, from a newly formed professional team taking our first steps into the Women’s Super League to an established side in the top-flight, has been colossal, and Matt has been one of the leading figures in that effort.
“Personally, it has been a pleasure working closely with Matt and, although we are parting ways, we do so amicably and with plenty of unforgettable memories shared. I genuinely wish Matt all the best for the future.”
This weekend get a £10 free bet with Betfair, when you bet £10 on a Same Game Multi on the Premier League.
Terms: Min £10 Same Game Multi bet on any EPL match this Fri – Sun. Free bet valid for 72 hours, awarded at bet settlement. Excludes cashed out bets. T&Cs apply.