Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3269
Mikel Arteta (Arsenal) 2000
Marco Silva (Fulham) 1443
Eddie Howe (Newcastle United) 1313
Kieran McKenna (Ipswich Town) 1275
Unai Emery (Aston Villa) 955
Andoni Iraola (Bournemouth) 725
Longest current tenure in Championship
Manager Days
John Mousinho (Portsmouth) 875
Daniel Farke (Leeds United) 710
Danny Röhl (Sheffield Wednesday) 609
Martí Cifuentes (Queens Park Rangers) 592
Chris Wilder (Sheffield United) 556
Régis Le Bris (Sunderland) 347
Scott Parker (Burnley) 343
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 1680
Phil Parkinson (Wrexham) 1443
Dave Challinor (Stockport County) 1319
Richie Wellens (Leyton Orient) 1192
Gary Caldwell (Exeter City) 963
Darren Ferguson (Peterborough United) 891
Michael Skubala (Lincoln City) 578
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5867
Andy Woodman (Bromley FC) 1537
Paul Cook (Chesterfield) 1219
Johnnie Jackson (AFC Wimbledon) 1124
Lee Bell (Crewe Alexandra) 952
Mat Sadler (Walsall) 786
Grant McCann (Doncaster Rovers) 763
  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)