Insights

Recognition and Credibility Stronghold Engineering has a strong reputation for quality, safety, and excellence, evidenced by multiple awards including the ABC Regional Excellence Award, Accredited Quality Contractor status, and recognition as a top performer in the industry. This credibility makes them a reliable partner for large-scale, high-profile construction projects.

Expanding Project Portfolio With experience in ground-up facilities, seismic upgrades, renovations, civil, infrastructure, and renewable energy projects, Stronghold demonstrates versatility and capacity to handle diverse building and infrastructure needs, presenting opportunities for collaboration across multiple sectors.

National and Local Recognition Recognition as one of the top companies to work for and being listed among the top contractors nationally and regionally positions Stronghold as an attractive client for suppliers and service providers seeking partnership with industry leaders committed to safety, quality, and employee satisfaction.

Financial Capacity With annual revenues estimated between $50 million and $100 million and a substantial project history exceeding $2.5 billion, Stronghold has the financial resources to undertake and sustain large-scale projects, indicating potential for high-value sales opportunities.

Focus on Innovation and Sustainability Recent awards for photovoltaics and renewable energy projects suggest a strategic focus on sustainable solutions, creating potential sales opportunities in green technology, energy-efficient products, and environmentally sustainable construction practices.

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Stronghold Engineering, Inc. Tech Stack

Stronghold Engineering, Inc. uses 8 technology products and services including jsDelivr, MySQL, Font Awesome, and more. Explore Stronghold Engineering, Inc.'s tech stack below.

  • jsDelivr
    Content Delivery Network
  • MySQL
    Database
  • Font Awesome
    Font Scripts
  • Google Fonts API
    Font Scripts
  • PHP
    Programming Languages
  • Yoast SEO
    Search Engines
  • UIKit
    UI Frameworks
  • Facebook
    Widgets

Media & News

Stronghold Engineering, Inc.'s Email Address Formats

Stronghold Engineering, Inc. uses at least 2 format(s):
Stronghold Engineering, Inc. Email FormatsExamplePercentage
FirstL@teamsei.comJohnD@teamsei.com
72%
Last@teamsei.comDoe@teamsei.com
22%
First@teamsei.comJohn@teamsei.com
4%
LF@teamsei.comDJ@teamsei.com
2%
FirstL@strongholdengineering.comJohnD@strongholdengineering.com
97%
F.Last@strongholdengineering.comJ.Doe@strongholdengineering.com
3%

Frequently Asked Questions

Where is Stronghold Engineering, Inc.'s headquarters located?

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Stronghold Engineering, Inc.'s main headquarters is located at 150 West Walnut Avenue Perris, California 92571 United States. The company has employees across 3 continents, including North AmericaAsiaAfrica.

What is Stronghold Engineering, Inc.'s phone number?

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You can contact Stronghold Engineering, Inc.'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 Stronghold Engineering, Inc.'s official website and social media links?

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Stronghold Engineering, Inc.'s official website is strongholdengineering.com and has social profiles on LinkedIn.

How much revenue does Stronghold Engineering, Inc. generate?

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As of April 2026, Stronghold Engineering, Inc.'s annual revenue is estimated to be $50M.

What is Stronghold Engineering, Inc.'s SIC code NAICS code?

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Stronghold Engineering, Inc.'s SIC code is 1611 - Highway and Street Construction, Except Elevated Highways NAICS code is 23 - Construction.

How many employees does Stronghold Engineering, Inc. have currently?

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As of April 2026, Stronghold Engineering, Inc. has approximately 112 employees across 3 continents, including North AmericaAsiaAfrica. Key team members include President Principal Engineer: M. A.Owner: E. K.Controller: C. B.. Explore Stronghold Engineering, Inc.'s employee directory with LeadIQ.

What industry does Stronghold Engineering, Inc. belong to?

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Stronghold Engineering, Inc. operates in the Construction industry.

What technology does Stronghold Engineering, Inc. use?

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Stronghold Engineering, Inc.'s tech stack includes jsDelivrMySQLFont AwesomeGoogle Fonts APIPHPYoast SEOUIKitFacebook.

What is Stronghold Engineering, Inc.'s email format?

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Stronghold Engineering, Inc.'s email format typically follows the pattern of FirstL@teamsei.com. Find more Stronghold Engineering, Inc. email formats with LeadIQ.

When was Stronghold Engineering, Inc. founded?

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Stronghold Engineering, Inc. was founded in 1991.

Stronghold Engineering, Inc.

ConstructionCalifornia, United States51-200 Employees

Stronghold Engineering (SEI) is an award-winning design and construction firm specializing in renowned projects for some of the nation’s largest organizations.  Throughout our 32-year history, we have designed and constructed high profile ground up facilities, technically challenging repair and renovations for historical and non-historical facilities, and significant seismic upgrades, as well as large civil, infrastructure, and electrical projects exceeding $2.5 billion in construction cost.

SEI was founded in 1991 by owners Beverly and Scott Bailey. With a vision of becoming a reliable and reputable electrical contractor, a dream that started from their kitchen table with a handful of employees and clients, has grown exponentially to encompass General Contracting, Design and Electrical trades.  As a notable contractor in the construction, engineering and design-build industry, they have completed hundreds of projects ranging from renovation and new construction, to renewable energy and electrical contracting for numerous civic, private and governmental agencies over the course of their 32-year history. Their company has been recognized repeatedly with outstanding performance evaluations and national design and construction awards from DBIA, AGC, ENR and ABC, pointing to their commitment to quality, craftsmanship and safety. Stronghold prides themselves on an outstanding safety record and the ability to self-perform significant features of work on projects.  Furthermore, they are a WBENC and MBE/WBE Certified Company.

Section iconCompany Overview

Headquarters
150 West Walnut Avenue Perris, California 92571 United States
Phone number
SIC Code
1611 - Highway and Street Construction, Except Elevated Highways
NAICS Code
23 - Construction
Founded
1991
Employees
51-200

Section iconFunding & Financials

  • $50M$100M

    Stronghold Engineering, Inc.'s revenue is estimated to be in the range of $50M$100M

Section iconFunding & Financials

  • $50M$100M

    Stronghold Engineering, Inc.'s revenue is estimated to be in the range of $50M$100M

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