Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3126
Thomas Frank (Brentford) 2289
Mikel Arteta (Arsenal) 1857
Marco Silva (Fulham) 1300
Eddie Howe (Newcastle United) 1170
Kieran McKenna (Ipswich Town) 1132
Unai Emery (Aston Villa) 812
Longest current tenure in Championship
Manager Days
Paul Warne (Derby County) 852
Michael Carrick (Middlesbrough) 820
John Mousinho (Portsmouth) 732
Daniel Farke (Leeds United) 567
Danny Röhl (Sheffield Wednesday) 466
Martí Cifuentes (Queens Park Rangers) 449
Liam Manning (Bristol City) 441
Longest current tenure in League One
Manager Days
Ian Evatt (Bolton Wanderers) 1665
Nigel Clough (Mansfield Town) 1537
Phil Parkinson (Wrexham) 1300
Dave Challinor (Stockport County) 1176
Richie Wellens (Leyton Orient) 1049
Gary Caldwell (Exeter City) 820
Darren Ferguson (Peterborough United) 748
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5724
Andy Woodman (Bromley FC) 1394
Paul Cook (Chesterfield) 1076
Johnnie Jackson (AFC Wimbledon) 981
Lee Bell (Crewe Alexandra) 809
Mat Sadler (Walsall) 643
Grant McCann (Doncaster Rovers) 620
  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)