Twelve players brought in during the summer transfer window underlined the need for Celtic to get busy with a fairly massive overhaul.

It was always likely that Ange Postecoglou would prioritise the signings of new players as soon as he had his feet under the desk. A dozen new arrivals shows the weight of the job he inherited and yet there remains an argument that when it comes to serious depth over the course of a 55-60 game season that Celtic are still shy.

There is little that can be done to address that now but, crucially, with the window closed now until January there needs to be a look at the infrastructure of the club. Bringing in such numbers in one window is never going to be sustainable in terms of a regular success model.

Postecoglou wanted to deal with the here and now in terms of players when he first arrived and it is little wonder. A look at the goal Celtic conceded at Ibrox a week ago would have felt like deja-vu for those who have followed the club these past few seasons.

READ MORE: John Hughes talks Celtic, Tommy Burns, Pep Guardiola, Rod Stewart and scoring against Rangers 

The Greek-Australian – and any other incumbent of the position who will follow on from him – needs to be allowed to focus on what takes place on the pitch while those around him take care of other issues.

A goliath in terms of their football weight, Celtic need now to bring the backroom into line with a modern system.

And key in that set up is a director of football and head of recruitment. That is the next step in making sure the manager has all the support he needs.

Barring unmitigated circumstances elsewhere, the winners of the title this term will go directly into the group stages of the Champions League. It is a monumental prize worth a minimum of £30m – and that is a conservative estimate.

Having the squad ready to challenge for that is one thing but the bigger picture is behind the scenes where, come January, if Celtic need to be going back into the market that they have an experienced negotiator who can get to work.

Just as important as someone with a successful track record in player recruitment is director of football. Someone to assess the structure of the club, delegate responsibilities, work within the parameters of budgetary constraints and support the football department.

Losing goals from set-pieces has become the norm for Celtic on the pitch in the past few seasons just as the hunt for a commanding centre-half has become the summer project as the clock ticks on Champions League qualifiers.

If successful preparations and organisation help to create successful foundations and prepare for long-term strategies, it is only common sense to suggest that this is the next priority area for new chief executive Dom McKay.