Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3196
Thomas Frank (Brentford) 2359
Mikel Arteta (Arsenal) 1927
Marco Silva (Fulham) 1370
Eddie Howe (Newcastle United) 1240
Kieran McKenna (Ipswich Town) 1202
Unai Emery (Aston Villa) 882
Longest current tenure in Championship
Manager Days
Michael Carrick (Middlesbrough) 890
John Mousinho (Portsmouth) 802
Daniel Farke (Leeds United) 637
Danny Röhl (Sheffield Wednesday) 536
Martí Cifuentes (Queens Park Rangers) 519
Liam Manning (Bristol City) 511
Chris Wilder (Sheffield United) 483
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 1607
Phil Parkinson (Wrexham) 1370
Dave Challinor (Stockport County) 1246
Richie Wellens (Leyton Orient) 1119
Gary Caldwell (Exeter City) 890
Darren Ferguson (Peterborough United) 818
Michael Skubala (Lincoln City) 505
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5794
Andy Woodman (Bromley FC) 1464
Paul Cook (Chesterfield) 1146
Johnnie Jackson (AFC Wimbledon) 1051
Lee Bell (Crewe Alexandra) 879
Mat Sadler (Walsall) 713
Grant McCann (Doncaster Rovers) 690
  The longest managerial reign of all time in the English football league belongs to Fred Everiss, who was manager of West Bromwich Albion for over 45 years (from 1902 to 1948)