Since 1947, National Underground Group, formerly known as Hoffman Southwest Corp., has provided a full spectrum of services to maintain healthy underground infrastructures. Today, through our family of businesses, Pro-Pipe, Tri-State Utilities, Accumark, Pipe Vision and Benchmark, National Underground Group is focused on providing underground infrastructure solutions to municipalities, utilities, government agencies, construction companies and engineering firms throughout the U.S.
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National Underground Group Questions
The National Underground Group annual revenue was $47.1 million in 2026.
Jeff Kappler is the CEO of National Underground Group.
1 people are employed at National Underground Group.
National Underground Group is based in Irvine, California.
The NAICS codes for National Underground Group are [81, 811].
The SIC codes for National Underground Group are [721, 72].
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