Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3305
Mikel Arteta (Arsenal) 2036
Marco Silva (Fulham) 1479
Eddie Howe (Newcastle United) 1349
Unai Emery (Aston Villa) 991
Andoni Iraola (Bournemouth) 761
Daniel Farke (Leeds United) 746
Longest current tenure in Championship
Manager Days
Phil Parkinson (Wrexham) 1479
Kieran McKenna (Ipswich Town) 1311
John Mousinho (Portsmouth) 911
Danny Röhl (Sheffield Wednesday) 645
Nathan Jones (Charlton Athletic) 531
Chris Davies (Birmingham City) 408
Paul Heckingbottom (Preston North End) 333
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 1716
Dave Challinor (Stockport County) 1355
Richie Wellens (Leyton Orient) 1228
Johnnie Jackson (AFC Wimbledon) 1160
Gary Caldwell (Exeter City) 999
Darren Ferguson (Peterborough United) 927
Grant McCann (Doncaster Rovers) 799
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5903
Andy Woodman (Bromley FC) 1573
Dean Brennan (Barnet) 1398
Paul Cook (Chesterfield) 1255
Lee Bell (Crewe Alexandra) 988
Mat Sadler (Walsall) 822
Micky Mellon (Oldham Athletic) 645
  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)