Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3304
Mikel Arteta (Arsenal) 2035
Marco Silva (Fulham) 1478
Eddie Howe (Newcastle United) 1348
Unai Emery (Aston Villa) 990
Andoni Iraola (Bournemouth) 760
Daniel Farke (Leeds United) 745
Longest current tenure in Championship
Manager Days
Phil Parkinson (Wrexham) 1478
Kieran McKenna (Ipswich Town) 1310
John Mousinho (Portsmouth) 910
Danny Röhl (Sheffield Wednesday) 644
Nathan Jones (Charlton Athletic) 530
Chris Davies (Birmingham City) 407
Paul Heckingbottom (Preston North End) 332
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 1715
Dave Challinor (Stockport County) 1354
Richie Wellens (Leyton Orient) 1227
Johnnie Jackson (AFC Wimbledon) 1159
Gary Caldwell (Exeter City) 998
Darren Ferguson (Peterborough United) 926
Grant McCann (Doncaster Rovers) 798
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5902
Andy Woodman (Bromley FC) 1572
Dean Brennan (Barnet) 1397
Paul Cook (Chesterfield) 1254
Lee Bell (Crewe Alexandra) 987
Mat Sadler (Walsall) 821
Micky Mellon (Oldham Athletic) 644
  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)