This newly-created specialist role will support and work in close collaboration with the current performance, medical and rehabilitation leadership.
Schlumberger joins the Reds’ first-team backroom set-up at the AXA Training Centre from Schalke 04.
The 54-year-old does so after almost a year with the Royal Blues, where he held the position of head of fitness and prevention.
The German has previously worked with Jürgen Klopp, having spent four seasons with Borussia Dortmund between 2011 and 2015 as a rehabilitation coach.
After leaving Signal Iduna Park, he joined Bayern Munich in a similar capacity, before switching to Borussia Monchengladbach in 2017, where he was positioned for two-and-a-half campaigns prior to linking up with Schalke.
In addition, he enjoyed a spell with FC Nurnberg between 2005 and 2008, and has worked with the German Football Association, supporting the younger age groups.