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Sunbelt Transformer buys Delta Testing Services

Sunbelt Transformer, a portfolio company of Grey Mountain Partners, said Monday it acquired Delta Testing Services Inc. Financial terms weren’t announced. Bakersfield, California-based Delta Testing is an electrical services company.


SHARON, Pa.–(BUSINESS WIRE)–Sunbelt Transformer, a Grey Mountain Partners affiliate company, today announced it is acquiring California based Delta Testing Services Inc. (Delta Testing), an electrical services company.

The strategic acquisition of Delta Testing is a key part of Sunbelt’s strategy to broaden its scope of products and services and expand its geographical presence. “We’re extremely excited to have Delta Testing join our organization. Our culture, the growth of our business, and our ability to serve our customers ultimately depend on the quality of our people. Delta brings highly skilled, fantastic employees to our team, significantly expanding our capabilities and bolstering our California location, which is a focal point of our future success,” said Dan Sweeney, CEO of Sunbelt Transformer.
Delta Testing was formed in 1994 and has enjoyed tremendous growth serving the industrial and manufacturing industries throughout California. The company’s employees are experts in the techniques and procedures used for the maintenance, testing, and servicing of electrical equipment. Bob Nelson, the company’s founder, will continue in his role as the leader of the Delta Testing segment.
About Sunbelt Transformer
Sunbelt Transformer is the market leading customized solution provider of reconditioned and new transformer equipment for commercial and industrial end markets in the United States. For more information, please visit
About Delta Testing
Delta Testing specializes in the maintenance, testing, and servicing of electrical equipment in California, providing technical expertise and industry-leading service levels to industrial and manufacturing customers for more than twenty years.
About Grey Mountain Partners
Grey Mountain Partners is a Boulder, Colorado-based private equity firm that focuses on partnering with management teams to create lasting value through operational improvements and by supporting strategic growth initiatives. The firm invests in lower middle-market companies across a wide range of industries and has approximately $700 million of assets under management.
For additional details on the transaction, to discuss new investment opportunities, or to learn about Grey Mountain’s Executive Sponsorship Program, please contact Ben Ault or Dan Allen. For more information about Grey Mountain Partners, please visit