Longest current tenure

Longest current tenure in Premier League
Manager Days
Mikel Arteta (Arsenal) 2365
Eddie Howe (Newcastle United) 1678
Unai Emery (Aston Villa) 1320
Daniel Farke (Leeds United) 1075
Oliver Glasner (Crystal Palace) 845
Régis Le Bris (Sunderland) 712
Fabian Hürzeler (Brighton and Hove Albion) 711
Longest current tenure in Championship
Manager Days
Phil Parkinson (Wrexham) 1808
John Mousinho (Portsmouth) 1240
Nathan Jones (Charlton Athletic) 860
Chris Davies (Birmingham City) 737
Paul Heckingbottom (Preston North End) 662
Frank Lampard (Coventry City) 562
Alex Neil (Millwall) 530
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 2045
Richie Wellens (Leyton Orient) 1557
Johnnie Jackson (AFC Wimbledon) 1489
Grant McCann (Doncaster Rovers) 1128
Graham Alexander (Bradford City) 950
Alex Revell (Stevenage) 787
Gary Bowyer (Burton Albion) 543
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 6232
Andy Woodman (Bromley FC) 1902
Dean Brennan (Barnet) 1727
Paul Cook (Chesterfield) 1584
Lee Bell (Crewe Alexandra) 1317
Micky Mellon (Oldham Athletic) 974
David Artell (Grimsby Town) 929

  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)