Brandon Staley and Christian Parker interviewed for Defensive Coordinator, Doug Nussmeier interviewed for OC; all on Feb 16
For all those with Combine concerns, remember that the scouting staff already on this team have been working on evaluating the players who will be there for a year, two years or sometimes more. The Combine is not the beginning, or even the end, of that process.
A new coach or coaches can walk into that combine ready to look at the prospects on show, with a wealth of scouting information already under their arm.
Also remember, this is not an unusual occurrence. Plenty of teams have appointed their HC and staff after their previous teams' playoffs were over and they then proceeded to get it done at the Combine. This is the NFL and it's all part of how things work.
If, however, you remain unconvinced and want to be worried about it, that's your prerogative 🙂