MidOcean Partners agrees to sell SI Solutions to Macquarie Asset Management, with Uni Super co-investing in the transaction. SI Solutions, headquartered in Huntersville, North Carolina, provides structural integrity engineering, testing, and software solutions to critical infrastructure owners and operators across 16 locations. The company supports more than 330 clients in nuclear, gas power, pipeline, petrochemical, civil, and industrial sectors.

Five of its 16 locations include testing laboratories. The deal is expected to close in fall 2026. Macquarie Asset Management manages US$498 billion in assets and is part of Macquarie Group, founded in 1969.

Uni Super invests approximately A$175 billion on behalf of about 688,000 members. Andrew Olinick, senior managing director at Macquarie Asset Management, commented on SI’s strong track record serving large utilities and its specialization in power generation markets as a strategic fit.