On Monday, June 30, Sean McElligott was in Berlin to finalise a major milestone. After nine months of confidential negotiations, he was selling Lynskey Engineering — a 61-year-old Irish business — to the Dussmann Group. While Lynskey Engineering employs 120 people and generates annual revenues of €60 million, it is now set to become part of a much larger organisation.  The Dussmann Group is a global services company with 70,000 employees and revenues of €3.3 billion. It is acquiring the Irish firm through its technical division, Dussmann Technical Solutions. Six years ago, this division had bought another Irish firm, the…