MidOcean Partners Signs Definitive Agreement to Sell SI Solutions to Macquarie Asset Management-led Consortium

Marks MidOcean’s Fourth Liquidity Event in 2026 and Another Successful Exit for the Firm’s Business Services Vertical

NEW YORK--(BUSINESS WIRE)--MidOcean Partners (“MidOcean” or the “Firm”), a premier New York-based alternative asset manager specializing in middle market private equity, alternative credit and structured equity, announced the signing of the sale of SI Solutions, Inc. and its subsidiaries (collectively, “SI” or the “Company”) to a Macquarie Asset Management-led consortium (“Macquarie”).

SI Solutions is a leading provider of engineering, testing and software solutions to critical infrastructure end markets. SI provides technical expertise and services to enable the reliability and resiliency of the U.S. power markets, safety and regulatory compliance of critical assets, and continued expansion of public and private infrastructure in the U.S. and abroad. Headquartered in Huntersville, North Carolina, SI operates from 16 locations across the U.S., five of which include testing laboratories, and currently supports more than 330 clients.

MidOcean executed a focused value creation strategy to build a comprehensive specialty engineering, advanced testing and digital platform serving nuclear and natural gas power generation and critical civil and natural gas infrastructure. During MidOcean’s ownership, SI completed three strategic add-on acquisitions, expanded SI’s service offering for nuclear power generation and advanced reactors, and built a holistic go-to-market strategy.

Elias Dokas, Managing Director at MidOcean, commented, “We are proud to have partnered with the SI management team to drive significant growth and strategic transformation. Over our two years of ownership together, we more than doubled the Company’s earnings, expanded margins and positioned the business for growth ahead. We look forward to watching the Company’s continued success.”

Brian Finnie, Managing Director at MidOcean, added, “We identified SI as an ideal partnership candidate through our thematic investment process. Through deep collaboration between management, the board, and MidOcean’s operating resources, we were able to transform SI into a leader in its industry. We are grateful to the SI team for their partnership and are excited for the Company’s future.”

“It’s been a true pleasure working with MidOcean,” said Mark Marano, Chief Executive Officer of SI. “Their strategic insight and support were instrumental in accelerating our growth and evolution. We’re excited to partner with Macquarie and their co-investors as we continue our growth story.”

The transaction is expected to close in 2026, subject to regulatory approvals and customary closing conditions.

About MidOcean Partners

MidOcean Partners is a premier New York-based alternative asset manager specializing in middle-market private equity, alternative credit, and structured equity. Since its inception in 2003, MidOcean Private Equity has targeted investments in high-quality middle-market companies in the consumer and business services sectors. MidOcean Credit Partners was launched in 2009 and currently manages a series of alternative credit strategies, collateralized loan obligations (CLOs), and customized separately managed accounts. In 2024, MidOcean expanded its platform to include structured equity, positioning the firm as a leading provider of capital solutions to the middle market. For more information, please visit www.midoceanpartners.com.

About SI Solutions

SI Solutions delivers a range of services to critical infrastructure owners and operators worldwide. The company employs 600 professionals across 16 locations in the U.S. SI Solutions’ technical capabilities span specialized engineering, instrumentation, electrical design and construction, controls engineering, and advanced non-destructive examination. For more information, please visit www.sisolutions.com.