Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3195
Thomas Frank (Brentford) 2358
Mikel Arteta (Arsenal) 1926
Marco Silva (Fulham) 1369
Eddie Howe (Newcastle United) 1239
Kieran McKenna (Ipswich Town) 1201
Unai Emery (Aston Villa) 881
Longest current tenure in Championship
Manager Days
Michael Carrick (Middlesbrough) 889
John Mousinho (Portsmouth) 801
Daniel Farke (Leeds United) 636
Danny Röhl (Sheffield Wednesday) 535
Martí Cifuentes (Queens Park Rangers) 518
Liam Manning (Bristol City) 510
Chris Wilder (Sheffield United) 482
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 1606
Phil Parkinson (Wrexham) 1369
Dave Challinor (Stockport County) 1245
Richie Wellens (Leyton Orient) 1118
Gary Caldwell (Exeter City) 889
Darren Ferguson (Peterborough United) 817
Michael Skubala (Lincoln City) 504
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5793
Andy Woodman (Bromley FC) 1463
Paul Cook (Chesterfield) 1145
Johnnie Jackson (AFC Wimbledon) 1050
Lee Bell (Crewe Alexandra) 878
Mat Sadler (Walsall) 712
Grant McCann (Doncaster Rovers) 689
  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)