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 Email Formats	Example	Percentage
First.Last@hswcorp.com	John.Doe@hswcorp.com	63%
FLast@hswcorp.com	JDoe@hswcorp.com	34%
FirstLast@hswcorp.com	JohnDoe@hswcorp.com	3%
First.Last@nationalu.com	John.Doe@nationalu.com	100%

National Underground Group Email Formats

Example

Percentage

First.Last@hswcorp.com

John.Doe@hswcorp.com

63%

FLast@hswcorp.com

JDoe@hswcorp.com

34%

FirstLast@hswcorp.com

JohnDoe@hswcorp.com

First.Last@nationalu.com

John.Doe@nationalu.com

100%

Frequently Asked Questions

Where is National Underground Group's headquarters located?

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?

You can contact National Underground Group's main corporate office by phone at

+1-949-380-****

. 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?

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

What is National Underground Group's NAICS code?

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

How many employees does National Underground Group have currently?

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?

National Underground Group operates in the Construction industry.

What technology does National Underground Group use?

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

What is National Underground Group's email format?

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

Q: How many employees does National Underground Group have currently?

National Underground Group has approximately 53 employees.

Q: What technology does National Underground Group use?

National Underground Group's tech stack includes jQuery, Google Cloud, Open Graph, Autoptimize, RSS.

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.

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