Private‑equity firm New Mountain Capital has taken a majority stake in Commonwealth Associates, a Jackson, Michigan‑based power‑engineering consultancy. The deal, whose financial terms remain undisclosed, adds a partner to a firm that serves investor‑owned utilities and contractor clients. The acquisition aligns New Mountain’s strategy to deepen its footprint in critical infrastructure sectors.

Demand for electricity is rising as utilities upgrade aging grids and invest in renewable‑linked infrastructure. Commonwealth plans to deploy the new capital to expand its engineering services, pursue larger contracts, and broaden geographic reach. The appointment of Dr. Hisham Mahmoud as chairman underscores a governance refresh aimed at steering the firm through this expansion phase, and significantly enhance its digital modeling capabilities.

Investors will watch how the infusion fuels Commonwealth’s ability to capture a larger share of the $150 billion U.S. power‑infrastructure pipeline slated through 2028. With New Mountain’s backing, the firm is positioned to compete for high‑margin design contracts and deepen ties with utility clients. The deal adds another energy‑focused asset to New Mountain’s growing portfolio.