Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3208
Thomas Frank (Brentford) 2371
Mikel Arteta (Arsenal) 1939
Marco Silva (Fulham) 1382
Eddie Howe (Newcastle United) 1252
Kieran McKenna (Ipswich Town) 1214
Unai Emery (Aston Villa) 894
Longest current tenure in Championship
Manager Days
Michael Carrick (Middlesbrough) 902
John Mousinho (Portsmouth) 814
Daniel Farke (Leeds United) 649
Danny Röhl (Sheffield Wednesday) 548
Martí Cifuentes (Queens Park Rangers) 531
Liam Manning (Bristol City) 523
Chris Wilder (Sheffield United) 495
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 1619
Phil Parkinson (Wrexham) 1382
Dave Challinor (Stockport County) 1258
Richie Wellens (Leyton Orient) 1131
Gary Caldwell (Exeter City) 902
Darren Ferguson (Peterborough United) 830
Michael Skubala (Lincoln City) 517
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5806
Andy Woodman (Bromley FC) 1476
Paul Cook (Chesterfield) 1158
Johnnie Jackson (AFC Wimbledon) 1063
Lee Bell (Crewe Alexandra) 891
Mat Sadler (Walsall) 725
Grant McCann (Doncaster Rovers) 702
  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)