Pepe Mel was fired by West Bromwich Albion on Monday, a day after securing the team’s status in the Barclays Premier League.
Mel took charge of the midlands club in January, having been chosen by the Baggies as the permanent successor to Steve Clarke, who was sacked in December.
Sporting and technical director Richard Garlick said: "We would like to thank Pepe for his efforts over the past four months in helping to keep the club in the Premier League and wish him well for the future.
Article continues below ...
"Both Pepe and the club set out with the best intentions of making the appointment work. However, having reflected on events both on and off the field during our talks, it became apparent that it was in the best interests of both parties for there to be an amicable parting.
"We are grateful for the manner in which the existing coaching staff and players have rallied behind Pepe to get the club over the line in what has proved an extremely competitive division."
Mel signed an 18-month deal when he took charge of the club in January, yet they initially struggled under the former Real Betis boss.
Some decent form just after the Christmas period took them up to 14th, but Mel did not claim victory until his eighth game in charge of the Baggies, while he only won once at The Hawthorns.
They eventually finished one place and three points outside the drop zone although his tenure was also blighted by the Nicolas Anelka "quenelle" saga.
Garlick added: "Although we have managed to achieve a fifth successive season of Premier League football, it has been a very disappointing campaign and lessons have been learned.
"The search for a new head coach has now begun. We aim to find the most suitable candidate who, with the support of the structure we have had in place for six years and are presently strengthening, will enable the club to be more competitive next season."
Assistant head coach Keith Downing and goalkeeper coach Dean Kiely will remain in their current roles with the club although first-team coach David Gomez has left his post.
Information from The Associated Press was used in this report.