Last March, security and alarm company Action24 celebrated 40 years in business. Its chief executive Aaron Mooney admits he didn’t do anything to mark the occasion as Ireland was in strict lockdown at the time. He was also busy closing the acquisition of rival Integral Security, taking his combined customer base to 20,000 commercial and residential accounts. Mooney had been working on the deal for months but it was all made easier as he knew the founders of Integral, Paul O’Connor and Adrian Thompson, well. “The alarm industry is a very close industry,” he laughed.  Mooney’s father Derek, who founded…