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Macquarie Asset Management–led consortium to buy SI Solutions from MidOcean Partners
Transactions - SEPTEMBER 11, 2026

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Macquarie Asset Management–led consortium to buy SI Solutions from MidOcean Partners

by Kali Arevalo

A consortium led by Macquarie Asset Management (MAM), including co-investors such as UniSuper, has agreed to acquire a majority stake in SI Solutions, a provider of structural integrity engineering, testing and software solutions to critical infrastructure owners and operators. The seller is MidOcean Partners, a private equity fund. Financial terms were not disclosed.

Headquartered in Huntersville, N.C., SI’s deep expertise in structural integrity was first developed to serve the power-generation sector and now extends across a broad range of markets including nuclear, gas power, pipeline, petrochemical, civil and industrial. SI operates from 16 locations, five of which include testing laboratories, and currently supports more than 330 clients.

The company determines whether critical, high-consequence assets are safe, compliant and fit for continued service. Its engineers and technicians evaluate remaining useful life through stress, fatigue and materials analysis, d

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