Current CEO Steve Bowcott, 66, will help with the handover after spending six-and-a-half years in the role.
Company Chair Gary McGann said: “We are pleased to appoint Paul to this role and are very fortunate to have someone of his calibre and experience to take up the leadership of the company.
“We are very grateful for Steve’s commitment and his service to Sisk since his appointment in 2015 and as his term comes to an end, the Board believes that Paul has the skills and qualities to continue to deliver our progressive strategy as the leading Irish Construction Company.”
Brown is currently Chief Operating Officer for the entire UK construction business and for the Group Civil Engineering business.
He said, “I am honoured to lead our business into the next phase of its development, building on Steve’s great work and that of my colleagues. I want to thank the Sicon Board, the Sisk family and all of my colleagues for their support and look forward to working with them towards the continued success of the company.”