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.
Atalanta 
Fiorentina 
Espanyol 
Cartagena 
Gibraltar 
Scotland 
Croatia 
North Macedonia 
Albania 
Liechtenstein 
England 
Bosnia & Herzegovina 
Germany 
Ukraine 
Slovenia 
Armenia 
Switzerland 
Estonia 
Romania 
Bulgaria 
Austria 
Serbia 
Portugal 
Finland 
Rep. Of Ireland 
Hungary 
Italy 
Turkey 
San Marino 
Slovakia 
Denmark 
Sweden 
Norway 
Kosovo 
Belgium 
Montenegro 
France 
Luxembourg 
Spain 
Andorra 
Wales 
Netherlands 
Canada 
Czech Republic 
Malta 
Kazakhstan 
Azerbaijan 
Belarus 
Russia 
Iceland 
Greece 
Poland