The 40-year-old was best remembered for his four-year spell at Bolton Wanderers between 2008 and 2012, during which he made 126 Premier League appearances from the right-back area.
Steinsson - a 46-cap Iceland international - retired from playing in 2013 and has since worked in various upstairs roles, joining Everton as a scout in 2018.
Steinsson was quickly promoted to the Toffees' chief scout in the summer of 2019 before leaving his post in December, as he worked for the Icelandic FA as their technical advisor.
The former Iceland defender also represented BSC Young Boys, Kayserispor and AZ Alkmaar during his playing days and took up his first technical role with the latter in 2015.
Steinsson spent just two months with AZ before becoming technical director of Fleetwood Town, where he served for over three-and-a-half years ahead of his 2018 switch to Everton.
Monaco 
Stade Brestois 29 
Bordeaux 
Nimes 
Bayern Munich 
FC Augsburg 
Paris Saint Germain 
Toulouse 
CSKA Moscow 
FC Rostov 
Leicester 
Chelsea 
Valencia 
Betis 
Dynamo Kyiv 
Chornomorets Odesa 
Verona 
Inter 
Bayer Leverkusen 
FC Heidenheim 
Borussia Dortmund 
SC Freiburg 
VFL Wolfsburg 
Union Berlin 
Arsenal 
Nottingham Forest 
Everton 
Brentford 
Spartak Moscow 
Lokomotiv Moscow 
Rangers 
Dundee Utd 
Atletico Madrid 
Alaves 
Lens 
Marseille 
Ingulets Petrove 
Shakhtar Donetsk 
AC Milan 
Juventus 
ST Malo 
Manchester City 
Tottenham 
Eintracht Frankfurt 
Werder Bremen 
Girona 
Espanyol 
Feyenoord 
Heerenveen 
ST Etienne 
Montpellier 
Grenoble Foot 38 
Heart Of Midlothian 
Celtic 
Reims 
Lyon 
PSV 
Groningen