Insights

Established Industry Presence National Underground Group has a long-standing history since 1947 in providing underground infrastructure solutions, making it a well-established player in the construction sector with deep industry experience and local market knowledge.

Growth Through Acquisition The company was acquired by ORIX Capital Partners in 2017, indicating a capacity for strategic growth and potential for future expansion through investment and partnership opportunities.

Diversified Service Portfolio With multiple subsidiaries such as Pro-Pipe, Tri-State Utilities, Accumark, Pipe Vision, and Benchmark, the company offers a broad range of underground services, presenting cross-sell and upsell opportunities across varied infrastructure projects.

Technological Adoption Utilizes advanced tools like AutoCAD, Google Cloud, and HubSpot, demonstrating a focus on modern technology and digital workflows that can enhance project efficiency and client engagement.

Financial Stability Generating revenue between 25 and 50 million dollars with a sizable team of up to 1000 employees, National Underground Group shows solid financial footing and capacity for large-scale infrastructure projects, making it a reliable partner for new contract opportunities.

Similar companies to National Underground Group

National Underground Group Tech Stack

National Underground Group uses 8 technology products and services including AutoCAD, Open Graph, RSS, and more. Explore National Underground Group's tech stack below.

  • AutoCAD
    Cad & Graphics
  • Open Graph
    Content Management System
  • RSS
    Content Management System
  • MySQL
    Database
  • Google Cloud
    Infrastructure As A Service
  • HubSpot
    Marketing Automation
  • PHP
    Programming Languages
  • Nginx
    Web Servers

National Underground Group's Email Address Formats

National Underground Group uses at least 2 format(s):
National Underground Group Email FormatsExamplePercentage
First.Last@hswcorp.comJohn.Doe@hswcorp.com
63%
FLast@hswcorp.comJDoe@hswcorp.com
34%
FirstLast@hswcorp.comJohnDoe@hswcorp.com
3%
First.Last@nationalu.comJohn.Doe@nationalu.com
100%

Frequently Asked Questions

Where is National Underground Group's headquarters located?

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National Underground Group's main headquarters is located at 47 Discovery Suite 250 Irvine, California 92618 United States. The company has employees across 2 continents, including North AmericaEurope.

What is National Underground Group's phone number?

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You can contact National Underground Group's main corporate office by phone at . For more prospecting data, LeadIQ has access to up-to-date and accurate contact information within our platform. Find, capture, and sync contact data to your CRM and sales tools in one click.

What is National Underground Group's official website and social media links?

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National Underground Group's official website is nationalu.com and has social profiles on LinkedIn.

What is National Underground Group's NAICS code?

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National Underground Group's NAICS code is 23 - Construction.

How many employees does National Underground Group have currently?

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As of February 2026, National Underground Group has approximately 53 employees across 2 continents, including North AmericaEurope. Key team members include Vice President Of Risk: D. H.Vice President And General Manager: Z. L.Small Business Owner: C. M.. Explore National Underground Group's employee directory with LeadIQ.

What industry does National Underground Group belong to?

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National Underground Group operates in the Construction industry.

What technology does National Underground Group use?

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National Underground Group's tech stack includes AutoCADOpen GraphRSSMySQLGoogle CloudHubSpotPHPNginx.

What is National Underground Group's email format?

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National Underground Group's email format typically follows the pattern of First.Last@hswcorp.com. Find more National Underground Group email formats with LeadIQ.

National Underground Group

ConstructionCalifornia, United States51-200 Employees

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.

Section iconCompany Overview

Headquarters
47 Discovery Suite 250 Irvine, California 92618 United States
Phone number
NAICS Code
23 - Construction
Employees
51-200

Section iconFunding & Financials

  • $10M$25M

    National Underground Group's revenue is estimated to be in the range of $10M$25M

Section iconFunding & Financials

  • $10M$25M

    National Underground Group's revenue is estimated to be in the range of $10M$25M

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