He played for the Dutchman at Southampton
Everton have agreed a fee to sign midfielder Morgan Schneiderlin from Manchester United for about €25 million.
The France international was signed by previous boss Louis van Gaal in 2015.
But he has failed to nail down a regular first team place.
He has played just eight times since Jose Mourinho became manager last summer including three appearances in the Premier League.
The 27 year old moved to Man United after impressing for former club Southampton under current Everton boss Ronald Koeman during the 2014-15 season.
He had originally arrived in English football as far back as 2008 when he signed from Southampton after leaving his regional club FC Strasbourg.
Starting off in the lower leagues with the club, Schneiderlin made 230 league appearances for Southampton in the Championship, League One and then in the Premier League.
His progress at Southampton resulted in Schneiderlin making his debut at international for France prior to the 2014 World Cup.
The defensive midfielder had been a standby option for the Les Bleus squad at the 2014 World Cup before injuries pushed into the final squad.
He also missed out initially for Euro 2016 but an injury to Lassana Diarra saw Schneiderlin make the cut.
After an impressive 2014-15 season, he then signed for Man United, where he made 39 appearances in all competitions in Van Gaal's second season in charge.
Meanwhile, Everton are also set to turn down loan offers for Ireland midfielder James McCarthy in favour of a permanent move.