Roy Keane is still determined to return to club management one day despite admitting football is a "mad industry".
Keane is in his fifth year as assistant to Republic of Ireland boss Martin O'Neill having previously managed in his own right at Sunderland and Ipswich.
As the pair started work with their players ahead of friendlies against France and the USA, the former Man United skipper reflected on the merry-go-round which has claimed Premier League casualties Sam Allardyce, David Moyes, Carlos Carvalhal and Paul Lambert this month.
Keane said: "Is that long, five years? No, it's difficult. The managers in England are under huge pressure but, having said that, they get well looked after in terms of their contracts.
"But there's huge pressure on managers. You look at managers going in and out of doors and it has you scratching your head.
"I used to try to figure it out before, but I've stopped trying to do that, it just doesn't make sense. It's kind of a mad industry we're in. If you can get a bit of stability in your job, fantastic, but at the moment, particularly at club level, it's non-existent."
Nevertheless, Keane has insisted since leaving Portman Road in January 2011 that he would return to club management one day, and he remains intent on doing so.
Asked if he would still like another chance, he replied: "Yes. Despite everything I said, I'd like another go, yes."
In the meantime, he and O'Neill will attempt to blood a new tranche of Republic internationals with the Championship play-off final and injuries having blown a hole in their resources to the extent that four uncapped players - Bohemians keeper Shane Supple, Peterborough counterpart Conor O'Malley, Millwall midfielder Shaun Williams and Shamrock Rovers striker Graham Burke - have been drafted in.