Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3181
Thomas Frank (Brentford) 2344
Mikel Arteta (Arsenal) 1912
Marco Silva (Fulham) 1355
Eddie Howe (Newcastle United) 1225
Kieran McKenna (Ipswich Town) 1187
Unai Emery (Aston Villa) 867
Longest current tenure in Championship
Manager Days
Michael Carrick (Middlesbrough) 875
John Mousinho (Portsmouth) 787
Daniel Farke (Leeds United) 622
Danny Röhl (Sheffield Wednesday) 521
Martí Cifuentes (Queens Park Rangers) 504
Liam Manning (Bristol City) 496
Chris Wilder (Sheffield United) 468
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 1592
Phil Parkinson (Wrexham) 1355
Dave Challinor (Stockport County) 1231
Richie Wellens (Leyton Orient) 1104
Gary Caldwell (Exeter City) 875
Darren Ferguson (Peterborough United) 803
Michael Skubala (Lincoln City) 490
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5779
Andy Woodman (Bromley FC) 1449
Paul Cook (Chesterfield) 1131
Johnnie Jackson (AFC Wimbledon) 1036
Lee Bell (Crewe Alexandra) 864
Mat Sadler (Walsall) 698
Grant McCann (Doncaster Rovers) 675
  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)