Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3262
Thomas Frank (Brentford) 2425
Mikel Arteta (Arsenal) 1993
Marco Silva (Fulham) 1436
Eddie Howe (Newcastle United) 1306
Kieran McKenna (Ipswich Town) 1268
Unai Emery (Aston Villa) 948
Longest current tenure in Championship
Manager Days
John Mousinho (Portsmouth) 868
Daniel Farke (Leeds United) 703
Danny Röhl (Sheffield Wednesday) 602
Martí Cifuentes (Queens Park Rangers) 585
Chris Wilder (Sheffield United) 549
Régis Le Bris (Sunderland) 340
Scott Parker (Burnley) 336
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 1673
Phil Parkinson (Wrexham) 1436
Dave Challinor (Stockport County) 1312
Richie Wellens (Leyton Orient) 1185
Gary Caldwell (Exeter City) 956
Darren Ferguson (Peterborough United) 884
Michael Skubala (Lincoln City) 571
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5860
Andy Woodman (Bromley FC) 1530
Paul Cook (Chesterfield) 1212
Johnnie Jackson (AFC Wimbledon) 1117
Lee Bell (Crewe Alexandra) 945
Mat Sadler (Walsall) 779
Grant McCann (Doncaster Rovers) 756
  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)