Company lists · Data refreshed September 2026

Top 13 Refinery engineering firms based in Chicago, United States

Name: Refinery engineering firms based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 28 companies tracked

RevenueBase identified 28 company matches for refinery engineering firms associated with Chicago, United States as of September 2026 and tracks 909 professional contacts across them, including 459 with verified work emails. Across the United States, Houston is the largest hub for this category (338 companies); Chicago has 28.

This list covers company matches for refinery engineering firms associated with Chicago, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 17, 2026 How this list was built

28Companies

909Contacts tracked

459Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 13 largest refinery engineering firms based in Chicago, United States

Ranked by team size

Top 13 of 28 company matches for refinery engineering firms based in Chicago, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Primera Engineers	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	201-500	362 contacts →
	Exact match “Primera Engineers is a mid-size, full-service, woman-owned (WBE) engineering design and consulting firm specializing in four areas of expertise: buildings, transportation…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	ESD NOW Stantec Consulting Services	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	201-500	208 contacts →
	Exact match “A global company, ESD is a leader in Improving Society Through the Built Environment.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3	KDM Engineering	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	51-200	114 contacts →
	Exact match “Founded upon a vision of challenging and changing the energy infrastructure to help light up the world, KDM specializes in engineering consulting and design, program and project…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	Environmental Design International INC	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	51-200	68 contacts →
	Exact match “Clients can trust Environmental Design International inc.(EDI) to be responsive, demonstrate technical excellence, adhere to the demands of budgets and schedules, and offer…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	Callan Consulting Engineers, INC	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	11-50	20 contacts →
	Exact match “Our Team, Your Building - It’s a Perfect Fit At Callan Consulting Engineers, we provide professional engineering guidance from project inception to post-occupancy, including…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	Elcora Solutions	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	11-50	17 contacts →
	Exact match “Elcora Engineering Solutions stands tall as a trailblazer in the energy sector.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Elevate Consulting Engineers Pllc	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	11 contacts →
	Exact match “We are hiring!” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	Diligent Design Group INC	Exact match	Chicago, United StatesHQ recorded Sep 17, 2026	1-10	10 contacts →
	Exact match “DDG is a consulting engineering company based in Chicago, Illinois.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Atwell Group	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	10 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	American Engineering Consultants, INC	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	7 contacts →
	Exact match “Construction Managers & Consulting Engineers” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	Allegro Civil Engineers	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	6 contacts →
	Exact match “A consulting civil engineering firm headquartered in Chicago, Illinois.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	Marsim Energy LLC	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	11-50	1 contacts →
	Exact match “We provide engineering, consulting, and technical advisory services to support assets owners, developers, contractors, and investors on various energy projects.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13	JLR Designs	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	1-10	1 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “refinery engineering firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 13 of 28 refinery engineering firms based in Chicago, United States

See the full list, filter by size, metro and specialty, and access 459 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Refinery engineering firms based in Chicago, United States at a glance

As of Sep 17, 2026

50.5%Verified-email coverage

32.5Average contacts per company

11-50Median size (employees)

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 28 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Chicago, United States whose business descriptions match “refinery engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 459 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 17, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Refinery engineering firms by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “refinery engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many refinery engineering firms are there based in Chicago, United States?

RevenueBase identified 28 company matches for refinery engineering firms associated with Chicago, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Primera Engineers tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most refinery engineering firms?

Houston leads the United States with 338 company records, followed by New York (40) and Austin (36). Chicago has 28.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 459 professional contacts with verified work emails tracked across these 28 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 28 refinery engineering firms based in Chicago, United States. Start with a free account, no credit card.

Download this list →

Related lists

Refinery engineering firms by geography

Browse the directory

About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.