Chiefs and former Southland Stag Robbie Robinson should slot in at the back once he finishes rehab on his hip issue.
Wing Tevita Li will be hot to trot, while 10/12 Matt McGahan, who should have seen some game time with the Blues, will run the cutter.
The pre-season programme shows a game tomorrow against Waikato in Raglan and Counties Manukau on Saturday at Onewa Domain. ITM Cup preparations will be rounded out on August 8 with a triple-header game against the All Blacks and Northland, billed "The Game of Three Halves".
Jackson confirmed weekend media reports that he had thrown his hat in the ring for the Blues assistant coach post. He said he had the blessing of the North Harbour union.
North Harbour squad
Pita Ahki, Ben Afeaki, David Bason, Rodrigo Costa, Luke Devcich, James Doyle, Michael Farmer, Irwin Finau, Daniel Halangahu, Bryn Hall, Luke Hamilton, Zak Judge, Tevita Li, Michael Little, Sione Mafileo, Jordan Manihera, Matt McGahan, Nic Mayhew, Brandon Nansen, Ray Nuia, James Parsons, Greg Pleasants-Tate, David Raikuna, Nio Ratumaitavuki, Robbie Robinson, Adrian Smith, Marty Swart, Hayden Triggs, Nafi Tuitavake, Jona Tuitoga, Jim Tuivaiti, Chris Vui, Tony Woodcock, Alex Woonton.