Insights

Mid-market Growth Duffield Associates is a mid-sized engineering firm with multiple regional offices and a broad service offering across civil, geotechnical, environmental, water, and coastal engineering. This presents cross-selling opportunities to expand into adjacent disciplines for current clients and to upsell integrated services across projects.

Diversified Capabilities With expertise spanning structural, electrical, landscape architecture, municipal, traffic, and laboratory services, there is potential to position Duffield as a single-source partner for full project lifecycles, appealing to clients seeking streamlined vendor management and coordinated deliverables.

Community & Culture The recognized Top Workplace status and emphasis on collaboration and community outreach can be leveraged to align with clients prioritizing employee engagement, sustainable practices, and stakeholder communication, opening doors with public-sector and community-focused entities.

Geography Focus Regional footprint in Delaware, Pennsylvania, New Jersey, Maryland offers proximity-based sales initiatives and cross-border project opportunities, especially in municipal, water and wastewater, and coastal/shoreline projects common to the Mid-Atlantic region.

Growth Narrative Active expansion and ongoing talent recruitment signal capacity for larger or more complex engagements, suggesting opportunities to discuss bundled services, capacity reserves, and scalable teams to win larger RFPs or multi-year programs.

Duffield Associates Tech Stack

Duffield Associates uses 8 technology products and services including Twemoji, Font Awesome, MooTools, and more. Explore Duffield Associates's tech stack below.

  • Twemoji
    Font Scripts
  • Font Awesome
    Font Scripts
  • MooTools
    Javascript Frameworks
  • Modernizr
    Javascript Libraries
  • Microsoft Word
    Office Suites
  • Yoast SEO
    Search Engines
  • VMware
    Virtualisation Software
  • Google Analytics
    Web Analytics

Duffield Associates's Email Address Formats

Duffield Associates uses at least 1 format(s):
Duffield Associates Email FormatsExamplePercentage
FLast@duffnet.comJDoe@duffnet.com
96%
First@duffnet.comJohn@duffnet.com
2%
Last@duffnet.comDoe@duffnet.com
1%
First.Last@duffnet.comJohn.Doe@duffnet.com
1%

Frequently Asked Questions

What is Duffield Associates's phone number?

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You can contact Duffield Associates'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 Duffield Associates's official website and social media links?

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Duffield Associates's official website is duffnet.com and has social profiles on LinkedIn.

What is Duffield Associates's SIC code NAICS code?

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Duffield Associates's SIC code is 7389 - Business Services, Not Elsewhere Classified NAICS code is 237 - Heavy and Civil Engineering Construction.

How many employees does Duffield Associates have currently?

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As of July 2026, Duffield Associates has approximately 57 employees across 1 continents, including North America. Key team members include President: V. B.Project Manager: J. T.Project Manager: J. R.. Explore Duffield Associates's employee directory with LeadIQ.

What industry does Duffield Associates belong to?

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Duffield Associates operates in the Civil Engineering industry.

What technology does Duffield Associates use?

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Duffield Associates's tech stack includes TwemojiFont AwesomeMooToolsModernizrMicrosoft WordYoast SEOVMwareGoogle Analytics.

What is Duffield Associates's email format?

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Duffield Associates's email format typically follows the pattern of FLast@duffnet.com. Find more Duffield Associates email formats with LeadIQ.

When was Duffield Associates founded?

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Duffield Associates was founded in 1976.
Duffield Associates logo

Duffield Associates

Civil EngineeringDelaware, United States51-200 Employees

Duffield Associates, established in 1976, is a civil engineering firm headquartered in a historic barn and farmhouse in Pike Creek Valley near Wilmington, Delaware. It maintains regional offices in Dover, DE; Philadelphia and Carlisle, PA; Thorofare, NJ; and Bel Air, MD to serve clients across the mid-Atlantic, offering a broad suite of services across civil, environmental, water and wastewater, and related disciplines. The firm serves both public and private sector clients, addressing infrastructure development, environmental stewardship, and community-scale improvements through integrated multidisciplinary approaches. Its culture emphasizes cross-disciplinary collaboration and community engagement, with a 2018 Top Workplace recognition in Delaware and growth-oriented hiring, such as the 2017 appointment of a senior consultant.

Section iconCompany Overview

Phone number
SIC Code
7389 - Business Services, Not Elsewhere Classified
NAICS Code
237 - Heavy and Civil Engineering Construction
Founded
1976
Employees
51-200

Section iconFunding & Financials

  • $10M$25M

    Duffield Associates's revenue is estimated to be in the range of $10M$25M

Section iconFunding & Financials

  • $10M$25M

    Duffield Associates's revenue is estimated to be in the range of $10M$25M

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