Longest current tenure in Championship

Manager Days
Phil Parkinson (Wrexham) 1961
John Mousinho (Portsmouth) 1393
Nathan Jones (Charlton Athletic) 1013
Chris Davies (Birmingham City) 890
Alex Neil (Millwall) 683
Mark Robins (Stoke City) 681
Steven Schumacher (Bolton Wanderers) 652
John Eustace (Derby County) 638
Brian Barry-Murphy (Cardiff City) 515
Julien Stéphan (Queens Park Rangers) 506
Chris Wilder (Sheffield United) 424
Tonda Eckert (Southampton) 376
Philippe Clement (Norwich City) 360
Vítor Matos (Swansea City) 354
Kim Hellberg (Middlesbrough) 351
James Morrison (West Bromwich Albion) 262
Michael Skubala (Bristol City) 168
Chris Cohen (Lincoln City) 168
Tom Shaw (Lincoln City) 168
Tony Mowbray (Blackburn Rovers) 161
Alessio Dionisi (Watford) 151
César Peixoto (Wolverhampton Wanderers) 151
Graham Alexander (Preston North End) 46
Fabio Celestini (Burnley) 16
Scott Parker (West Ham United) 9