The O’Connell Companies was established in 1979, but its history dates back to 1879, when Daniel O’Connell founded his construction company, Daniel O’Connell’s Sons. A century later, O’Connell Companies expanded and diversified into the construction management, property development, and energy and environmental services industries. Its affiliates include: DOC, a New England-based construction company; O’Connell Development Group, a real estate development group; Appleton Corporation, a property and asset management firm; and NEFCO, a biosolids management company.