RJ MacIsaac Construction Ltd. Is a homegrown second-generation Atlantic Canadian marine construction firm that specializes in maritime construction and demolition, ship recycling, tidal power, and general marine contracting. Since 1975 it has offered a wide variety of services, ranging from wharf building and breakwater construction to dismantling navy ships. RJ MacIsaac’s latest endeavour is the development of a ship recycling facility at the Port of Sheet Harbour within the eastern reaches of Halifax, Nova Scotia.