New Mountain Capital, an alternative investment manager, completed the acquisition of Aegion, a provider of technologies and services, for $1.1bn. “The completion of this transaction represents the exciting first step in advancing Aegion’s compelling near- and long-term growth prospects as an industry leader and a protector of communities and the environment. I look forward to working with the dedicated teams as we leverage our differentiated portfolio of technologies and delivering transformational solutions to maintain, rehabilitate and protect critical infrastructure around the world,” Robert M. Tullman, Aegion President and Chief Executive Officer.