Insights

Strategic Acquisition The company was acquired by ORIX Capital Partners in 2017, indicating private equity backing and potential for growth investments and increased capex to modernize underground infrastructure capabilities.

Underground Focus Specializes in full spectrum underground infrastructure services for municipalities, utilities, government agencies, construction firms, and engineering firms, suggesting cross-selling opportunities into public sector projects and utility upgrades.

Midmarket Scale Employee count and revenue place them in a mid-market niche with room for expanding project sizes, scope, and add‑on services through partnerships and subcontracting with larger contractors.

Financial Stability Reported revenue of 25 to 50 million with a CFO appointed in 2021, signaling formal financial governance and potential for structured procurement processes and favorable terms for large-scale contracts.

Tech & Compliance Existing tech stack includes AutoCAD, Google Cloud, and security/comms tools, indicating readiness for digital project management, BIM workflows, and secure document handling to streamline bids and field operations.

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National Underground Group Tech Stack

National Underground Group uses 8 technology products and services including QuickBooks, Linkedin Insight Tag, iCIMS, and more. Explore National Underground Group's tech stack below.

QuickBooks
Accounting And Finance
Linkedin Insight Tag
Analytics
iCIMS
Applicant Tracking Systems
AutoCAD
Cad & Graphics
Microsoft SharePoint
Content Management System
Mimecast Secure Email Gateway
Email Security
Google Cloud
Infrastructure As A Service
Piwik PRO Core
Web Analytics

Media & News

National Underground Group's Email Address Formats

National Underground Group uses at least 4 email formats:

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

Frequently Asked Questions

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.

How much revenue does National Underground Group generate?

As of October 2026, National Underground Group's annual revenue is estimated to be $25M - $50M.

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 October 2026, National Underground Group has approximately 50 employees across 2 continents, including North America and Europe. Key team members include Vice President And General Manager: Z. L., Small Business Owner: C. M. and Owner-Operator: N. 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 QuickBooks, Linkedin Insight Tag, iCIMS, AutoCAD, Microsoft SharePoint, Mimecast Secure Email Gateway, Google Cloud and Piwik PRO Core.

What is National Underground Group's email format?

National Underground Group's email format typically follows the pattern of First.Last@nationalu.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 50 employees.

Q: What technology does National Underground Group use?

National Underground Group's tech stack includes OWL Carousel, Piwik PRO Core, Really Simple Discovery, WordPress, Bootstrap.

Q: What is National Underground Group's NAICS code?

National Underground Group's NAICS code is 23 (Construction).

ConstructionCalifornia, United States11-50 Employees

National Underground Group is a construction-focused company dedicated to underground infrastructure. With roots dating back to 1947, it provides a full spectrum of services to maintain and upgrade underground networks and operates through a family of specialized brands including Pro-Pipe, Tri-State Utilities, Accumark, Pipe Vision, and Benchmark. Based in Irvine, California, the company serves municipalities, utilities, government agencies, construction firms, and engineering practices across the United States. It positions itself as an integrated solutions provider for planning, installation, maintenance, and modernization of underground systems. These activities place the company within the broader underground construction sector, serving a diverse set of public and private sector clients.