Longest current tenure

Longest current tenure in Premier League
Manager Days
Pep Guardiola (Manchester City) 3256
Thomas Frank (Brentford) 2419
Mikel Arteta (Arsenal) 1987
Marco Silva (Fulham) 1430
Eddie Howe (Newcastle United) 1300
Kieran McKenna (Ipswich Town) 1262
Unai Emery (Aston Villa) 942
Longest current tenure in Championship
Manager Days
Michael Carrick (Middlesbrough) 950
John Mousinho (Portsmouth) 862
Daniel Farke (Leeds United) 697
Danny Röhl (Sheffield Wednesday) 596
Martí Cifuentes (Queens Park Rangers) 579
Liam Manning (Bristol City) 571
Chris Wilder (Sheffield United) 543
Longest current tenure in League One
Manager Days
Nigel Clough (Mansfield Town) 1667
Phil Parkinson (Wrexham) 1430
Dave Challinor (Stockport County) 1306
Richie Wellens (Leyton Orient) 1179
Gary Caldwell (Exeter City) 950
Darren Ferguson (Peterborough United) 878
Michael Skubala (Lincoln City) 565
Longest current tenure in League Two
Manager Days
Simon Weaver (Harrogate Town) 5854
Andy Woodman (Bromley FC) 1524
Paul Cook (Chesterfield) 1206
Johnnie Jackson (AFC Wimbledon) 1111
Lee Bell (Crewe Alexandra) 939
Mat Sadler (Walsall) 773
Grant McCann (Doncaster Rovers) 750
  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)