Honestly in the corporate side of the house it varies wildly. Hopefully you can contact someone who has the inside on this particular FD.
But in place of that, just go in there like you are interviewing for the CEO's position, confident but not cocky, well studied and prepared and with an open mind.
Airline interviews seem to have a certain expected flow to them, not all the same mind you but a predictable flow nonetheless.
In my aviation past (All corporate or business based charter) I've seen places where the interview and hiring process was over two years long and I've worked for one where I was interviewed over a lunch, put in a sim two hours later and hired the next day.
With a department the size of this one I'd guess the process will be a bit involved with several sit downs, HR, panel interview and a CP interview... might even have to go and introduce yourself to the real money of the company. Board of Directors or partial BOD meet-and-greet interviews are not too uncommon for department where Pilots are all considered management level employees.
The usual stuff will follow, medical, BI Records check etc...
Dress for the part, invest in a good suit, have it tailored to fit and a pair of shoes to match.
I glad to hear of movement within the industry, so many places closing up shop and selling of equipment nowadays.