Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3198
Thomas Frank (Brentford) 2361
Mikel Arteta (Arsenal) 1929
Marco Silva (Fulham) 1372
Eddie Howe (Newcastle United) 1242
Kieran McKenna (Ipswich Town) 1204
Unai Emery (Aston Villa) 884
Longest current tenure in Championship
Manager Days
Michael Carrick (Middlesbrough) 892
John Mousinho (Portsmouth) 804
Daniel Farke (Leeds United) 639
Danny Röhl (Sheffield Wednesday) 538
Martí Cifuentes (Queens Park Rangers) 521
Liam Manning (Bristol City) 513
Chris Wilder (Sheffield United) 485
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 1609
Phil Parkinson (Wrexham) 1372
Dave Challinor (Stockport County) 1248
Richie Wellens (Leyton Orient) 1121
Gary Caldwell (Exeter City) 892
Darren Ferguson (Peterborough United) 820
Michael Skubala (Lincoln City) 507
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5796
Andy Woodman (Bromley FC) 1466
Paul Cook (Chesterfield) 1148
Johnnie Jackson (AFC Wimbledon) 1053
Lee Bell (Crewe Alexandra) 881
Mat Sadler (Walsall) 715
Grant McCann (Doncaster Rovers) 692
  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)