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The Source Group (SGI)
has been acquired by
Apex Companies, LLC.

One company. One Website.

Please click below or wait for the redirect to the Apex website where you’ll discover our expanded capabilities, new areas of expertise, and innovative approaches to solving your business challenges.

Continue to Apex


Since 1988, Apex has been a leader in full-service water resources, environmental services, and industrial hygiene solutions. Rated #14 as an ENR All-Environmental Firm and ranked as a Top 50 Zweig Group Hot Firm, Apex is known for its technical expertise, quick response time, unparalleled performance, and cost efficiency. We employ over 700 professionals—including geologists, hydrogeologists, engineers, air quality experts, environmental scientists, information management experts, industrial hygienists, safety specialists and field technicians—across more than 60 offices throughout the United States.