Insights

Established Industry Presence National Underground Group has a long-standing history since 1947, highlighting their established reputation and deep expertise in underground infrastructure services within the construction industry.

Expanding Capabilities Through its family of businesses including Pro-Pipe and Tri-State Utilities, the company demonstrates diversified service offerings, creating cross-selling opportunities across different underground infrastructure solutions.

Significant Market Reach With clients comprising municipalities, utilities, government agencies, and engineering firms across the U.S., there are ample opportunities to target large-scale projects and foster long-term contracts.

Robust Financial Profile Generating revenue between $10 million and $25 million, the company shows healthy financial stability, making it a viable partner for growth-oriented collaborations or strategic investments.

Technological Adoption Utilizing a modern tech stack including AutoCAD, Google Cloud, and HubSpot indicates openness to digital tools, which can be leveraged to streamline project management and enhance proposal processes for potential clients.

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 March 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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