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New York - March 2016 - Apex Companies, LLC ("Apex"), a portfolio company of Tailwind Capital, announced that it has acquired The Source Group ("SGI"), a technical consulting and environmental engineering firm specializing in complex subsurface site assessments, remedial design, and litigation management, and remediation.

With offices in Pleasant Hill, Grass Valley, Thousand Oaks and Signal Hill, California, SGI has been serving oil and gas, government, manufacturing, financial, construction, and real estate development clients since 1997. The company's expertise spans environmental assessments, remediation and restoration, water resources evaluations and planning, risk management, legal/litigation support, and cost negotiations.

By combining forces, Apex grows to approximately 700 professionals; adds four new offices to its asset base; expands its portfolio with additional clients within the utilities, industrial manufacturing, and federal and state government sectors; and strengthens its regulatory framework with established relationships with California's Regional Water Boards and Department of Toxic Substances Control.

"SGI not only complements our services and culture, but like our recent acquisitions of similar companies, this team brings innovative approaches to tackling our clients' toughest challenges," stated Apex President and CEO Peter Ceribelli. "Bringing together the highest caliber of professionals means we can challenge the status quo with new ways of thinking and, in turn, deliver more robust services, solutions, and savings for our clients. We welcome SGI to the Apex family as we look forward to a very productive and profitable new year."

SGI Managing Principal and Partner Neil Irish stated, "For nearly two decades our mission has been clear - to be a great employer and a great service provider. Our success is attributable to our senior level experts who leverage their creativity and ingenuity to provide superior value to our clients. And we applaud Apex for adopting that same philosophy." SGI Co-founder and Partner Paul Horton continued, "We've accomplished our mission as a niche firm that has remained at the forefront of our industry. As we looked to our future, we set the bar even higher and found Apex to be the right firm to maximize our strengths so we can deliver additional opportunities and advantages to our clients and our employees."

About Apex Companies
Founded in 1988, Apex Companies, LLC is an award-winning water resources and environmental consulting and engineering firm dedicated to providing private and public sector clients with full-service, single-source solutions. Recognized as a Top 100 Environmental Firm and a Top 500 Design Firm by ENR magazine, and rated among the top 20 Zweig Group 2015 Hot Firms, Apex is known for its technical expertise, quick response time, professional performance, high-quality results, and cost efficiency. Apex now employs approximately 700 professionals including geologists, hydrogeologists, engineers, air quality experts, environmental scientists, industrial hygienists, safety specialists and field technicians, across more than 55 offices throughout the United States. For more information, please visit www.apexcos.com.

About Tailwind Capital
Tailwind Capital is a leading private equity firm focused on growth-oriented investments in the lower end of the middle market in targeted sectors within the healthcare, business and industrial services industries in North America. Tailwind partners with experienced management teams and entrepreneurs to transform businesses through organic growth initiatives, acquisitions, and operational and strategic improvements. Since its founding in 2003, Tailwind and its portfolio companies have completed more than 75 acquisitions. The firm currently manages over $2 billion of committed equity capital. 
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