No idea.. I mean I know its a firm that's got history of working on some historical buildings, but that's in the companys past, when it was run by the former company heads. I know its run by a family but even so..if I was renovating something of such importance theres no way I would put it in the hands of someone just over 30 years of age. I understand that is pretty ageist of me, but some things imo, need an older head overseeing it.
Not putting the blame squarely at the firm involved, it may have still happened with anyone else, I'm just surprised that a national (global even?) monument would be put in the hands of someone so young.
When I worked for an insurance company which specialised in church/cathedral insurance about 10 years ago, there weren't any large building firms capable of repairing and restoring cathedrals. They were mostly one-man bands or very small groups of highly specialised masons/roofers etc (usually from France too). Might be slightly different now, don't know.
Don't forget that when the cathedral was being built, 30 would have been old . The original master builders probably weren't much older (although to be fair they probably started work at 10...)
Very glad the damage appears to have been contained though. If the stone framework is stable, hopefully they can do a good job of repairing it, especially as much as the damage is above the vault and shouldn't be visible from the inside.