Insights

Veteran-led credibility LLI Engineering is a veteran-owned small business with a long history since 1910, positioning it as a trusted partner for government and defense-related infrastructure projects seeking reliability and mission-aligned partners.

Niche sustainability The firm focuses on green building design and energy conservation modifications, suggesting opportunities in retrofits, net-zero initiatives, and sustainable facility upgrades for commercial and critical infrastructure clients.

Small-to-mid client growth With 11-50 employees and revenues in the mid-range, LLI targets scalable, project-based engagements where larger firms may not be as responsive; consider upsell on full-service engineering bundles and phased delivery for mid-market opportunities.

Integrated engineering stack Offering electrical, mechanical, piping, and structural engineering in-house opens doors for multi-discipline projects; pursue opportunities that require coordinated design across disciplines, such as infrastructure upgrades and energy retrofit programs.

Digital modernization potential Current tech stack includes common enterprise tools and web technologies; present opportunities around digital design workflows, BIM/simulation integrations, and cloud-based collaboration to improve project efficiency for clients in utility, healthcare, and critical facilities sectors.

LLI Engineering Tech Stack

LLI Engineering uses 8 technology products and services including AutoCAD, SketchUp, Squarespace, and more. Explore LLI Engineering's tech stack below.

LLI Engineering's Email Address Formats

LLI Engineering uses at least 1 format(s):
LLI Engineering Email FormatsExamplePercentage
FLast@lliengineering.comJDoe@lliengineering.com
93%
F.Last@lliengineering.comJ.Doe@lliengineering.com
3%
FirstL@lliengineering.comJohnD@lliengineering.com
2%
LastF@lliengineering.comDoeJ@lliengineering.com
2%

Frequently Asked Questions

What is LLI Engineering's phone number?

Minus sign iconPlus sign icon
You can contact LLI Engineering'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 LLI Engineering's official website and social media links?

Minus sign iconPlus sign icon
LLI Engineering's official website is lliengineering.com and has social profiles on LinkedIn.

How much revenue does LLI Engineering generate?

Minus sign iconPlus sign icon
As of August 2026, LLI Engineering's annual revenue is estimated to be $25M - $50M.

What is LLI Engineering's SIC code NAICS code?

Minus sign iconPlus sign icon
LLI Engineering's SIC code is 8711 - Engineering Services NAICS code is 5413 - Architectural, Engineering, and Related Services.

How many employees does LLI Engineering have currently?

Minus sign iconPlus sign icon
As of August 2026, LLI Engineering has approximately 45 employees across 3 continents, including North AmericaAsiaSouth America. Key team members include Vice President: J. B.Controller: T. G.Project Manager: A. L.. Explore LLI Engineering's employee directory with LeadIQ.

What industry does LLI Engineering belong to?

Minus sign iconPlus sign icon
LLI Engineering operates in the Engineering Services industry.

What technology does LLI Engineering use?

Minus sign iconPlus sign icon
LLI Engineering's tech stack includes AutoCADSketchUpSquarespaceAIA Contract DocumentsSquarespace CommerceMicrosoft 365AfterPayAdobe Creative Suite.

What is LLI Engineering's email format?

Minus sign iconPlus sign icon
LLI Engineering's email format typically follows the pattern of FLast@lliengineering.com. Find more LLI Engineering email formats with LeadIQ.

When was LLI Engineering founded?

Minus sign iconPlus sign icon
LLI Engineering was founded in 1910.
LLI Engineering logo

LLI Engineering

Engineering ServicesPennsylvania, United States11-50 Employees

LLI Engineering is a veteran-owned engineering services firm based in Pittsburgh, Pennsylvania, founded in 1910. The company provides multidisciplinary engineering support across electrical, mechanical, piping, and structural disciplines for commercial projects, critical facilities, and infrastructure upgrades. Its work encompasses green building design, energy conservation modifications, project engineering, and the preparation of engineering estimates. 

Serving clients that require facility and infrastructure upgrades, LLI focuses on delivering practical engineering solutions that enhance efficiency and resilience. In the engineering services landscape, the firm offers integrated design and analysis for a range of projects, supported by its project engineering and estimating capabilities. Based in Pittsburgh, Pennsylvania, the company operates as a small, veteran-owned business with a scope that includes commercial, critical facilities, and infrastructure initiatives.

Section iconCompany Overview

Phone number
SIC Code
8711 - Engineering Services
NAICS Code
5413 - Architectural, Engineering, and Related Services
Founded
1910
Employees
11-50

Section iconFunding & Financials

  • $25M - $50M

    LLI Engineering's revenue is estimated to be in the range of $25M - $50M

Section iconFunding & Financials

  • $25M - $50M

    LLI Engineering's revenue is estimated to be in the range of $25M - $50M

Ready to create more pipeline?

Get a demo and discover why thousands of SDR and Sales teams trust
LeadIQ to help them build pipeline confidently.

© LeadIQ, Inc. All rights reserved.