Reading first-team coach John O'Shea has signed a contract extension with the Championship club.
The former Republic of Ireland captain spent the final season of his playing career with the Royals before joining their coaching staff last summer.
Reading sacked manager Jose Gomes in October after a poor start that left them third-bottom in the table, turning to Mark Bowen.
Bowen gave up his role as the club's sporting director to replace Gomes and has guided Reading up to 14th in the table after a nine-game unbeaten run, and he and his coaching staff have been rewarded with new deals.
"Reading Football Club are delighted to announce that manager Mark Bowen has put pen to paper on a new contract, which will see him remain as Royals boss until the summer of 2021," the club said in a statement.
"Assistant manager Eddie Niedzwiecki and first-team coach John O'Shea have also signed new deals with the club as key members of Bowen's team in the home dugout at Madejski Stadium, while it has also been agreed that goalkeeping coach James Bittner will continue in his role with the first team until the end of the current campaign."