Company lists · Data refreshed October 2026

Top 25 Conceptual studies and pre-front-end engineering design services based in the United States

Name: Conceptual studies and pre-front-end engineering design services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 23, 2026 594 companies tracked

RevenueBase identified 594 company matches for conceptual studies and pre-front-end engineering design services associated with the United States as of October 2026 and tracks 11,623 professional contacts across them, including 4,210 with verified work emails. Houston is the largest hub.

This list covers company matches for conceptual studies and pre-front-end engineering design services associated with the 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 October 23, 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 Oct 23, 2026 How this list was built

594Companies

11,623Contacts tracked

4,210Verified emails

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The 25 largest conceptual studies and pre-front-end engineering design services based in the United States

Ranked by team size

Top 25 of 594 company matches for conceptual studies and pre-front-end engineering design services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 23, 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	Optimized Process Designs LLC	Exact match	Katy, TX, United StatesHQ recorded Oct 23, 2026	1,001-5,000	452 contacts →
	Exact match “Established in 1980, Optimized Process Designs LLC (OPD) provides clients with detailed engineering packages in all disciplines, single-point procurement for all equipment and…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
2	The Austin Company	Exact match	Cleveland, OH, United StatesHQ recorded Oct 23, 2026	201-500	384 contacts →
	Exact match “The Austin Company offers a comprehensive portfolio of in-house services, including planning, architectural design, engineering, design-build, construction management, and…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
3	TRC Worldwide Engineering, INC	Exact match	Brentwood, IL, United StatesHQ recorded Oct 23, 2026	201-500	323 contacts →
	Exact match “Founded in 1989, TRC Worldwide Engineering, Inc.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
4	Samuel Engineering, INC	Exact match	Greenwood Village, CO, United StatesHQ recorded Oct 23, 2026	201-500	293 contacts →
	Exact match “Samuel is a multi-discipline engineering, procurement, fabrication, and construction company.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
5	Bala Consulting Engineers	Exact match	Wayne, PA, United StatesHQ recorded Oct 23, 2026	201-500	290 contacts →
	Exact match “Established in 1982 Bala Consulting Engineers, Inc.(Bala) is a multi-disciplined engineering design organization providing services to the Corporate, Transportation, Hospitality…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
6	Design Systems, INC	Exact match	Farmington Hills, MI, United StatesHQ recorded Oct 23, 2026	201-500	249 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
7	Ambitech Engineering	Exact match	Downers Grove, IL, United StatesHQ recorded Oct 23, 2026	501-1,000	224 contacts →
	Exact match “Ambitech is a full-service provider of engineering design services with deep expertise in Front-End Loading (FEL/FEED) work.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
8	Waldemar S. Nelson & Co., INC	Exact match	New Orleans, LA, United StatesHQ recorded Oct 23, 2026	201-500	220 contacts →
	Exact match “For over a half century our professional staff - in meeting technical, schedule, budget, and regulatory requirements - has successfully completed projects in the U.S.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
9	ZAP Engineering & Construction Services, INC	Exact match	Lakewood, CO, United StatesHQ recorded Oct 23, 2026	201-500	214 contacts →
	Exact match “ZAP is a multidisciplinary engineering and EPC partner supporting complex capital projects across North America.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
10	IDS Group, INC	Exact match	Irvine, CA, United StatesHQ recorded Oct 23, 2026	51-200	209 contacts →
	Exact match “IDS is an award-winning engineering and architectural firm offering multidisciplinary consulting services through our staff of 90 professionals.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
11	Pare Corporation	Exact match	Lincoln, RI, United StatesHQ recorded Oct 23, 2026	51-200	183 contacts →
	Exact match “Established in 1970, Pare Corporation has been a trusted engineering partner to municipal and state governments, architects, and owner/developer teams for 50 years.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
12	Dubois & King, INC	Exact match	Randolph, VT, United StatesHQ recorded Oct 23, 2026	51-200	150 contacts →
	Exact match “Established in 1962, DuBois & King is a multidisciplined consulting engineering firm with extensive experience providing planning, permitting, and technical design services.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
13	Carroll Daniel Engineering	Exact match	Greenville, SC, United StatesHQ recorded Oct 23, 2026	201-500	145 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
14	Ieng Design	Exact match	Chesterfield, MO, United StatesHQ recorded Oct 23, 2026	51-200	131 contacts →
	Exact match “iENG offers full-service design capabilities.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
15	Thorson Baker Associates TBA	Exact match	Richfield, OH, United StatesHQ recorded Oct 23, 2026	51-200	115 contacts →
	Exact match “Thorson • Baker + Associates (TBA) was founded in 1993 to provide engineering consultation and design services for the building construction industry.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
16	CDG Engineers, INC	Exact match	St. Louis, MO, United StatesHQ recorded Oct 23, 2026	51-200	114 contacts →
	Exact match “CDG Engineers is a full service, multi-discipline professional services organization with capabilities in civil, structural, electrical and mechanical engineering, as well as…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
17	Orion Engineers Constructors	Exact match	Baton Rouge, LA, United StatesHQ recorded Oct 23, 2026	51-200	110 contacts →
	Exact match “Orion has the ability to meet your every engineering need from determining the feasibility of your project right through to full EPC, commissioning and startup of industrial…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
18	Novus Labs	Exact match	Hillsboro, OR, United StatesHQ recorded Oct 23, 2026	51-200	102 contacts →
	Exact match “Novus Labs is a new kind of solutions provider.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
19	Gulf States Engineering, INC	Exact match	Mobile, AL, United StatesHQ recorded Oct 23, 2026	51-200	97 contacts →
	Exact match “At Gulf States Engineering, Inc.(GSE), we offer comprehensive services encompassing every stage of an engineering project's life cycle.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
20	ME Engineering, P.C., Mechanical & Electrical Engineering	Exact match	Rochester, NY, United StatesHQ recorded Oct 23, 2026	51-200	94 contacts →
	Exact match “M/E Engineering, P.C.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
21	JŌB EPC Company Jepco	Exact match	Salt Lake City, UT, United StatesHQ recorded Oct 23, 2026	51-200	91 contacts →
	Exact match “Since 2005, Jōb EPC Company has delivered top-notch EPC, standalone engineering and specialty chemical optimization services for our clients within the refining, petrochemical…” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
22	BLW Engineers	Exact match	Littleton, MA, United StatesHQ recorded Oct 23, 2026	51-200	89 contacts →
	Exact match “BLW Engineers is a consulting engineering firm providing design related services for Mechanical and Electrical building systems.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
23	Kaeko, INC	Exact match	Chandler, AZ, United StatesHQ recorded Oct 23, 2026	51-200	87 contacts →
	Exact match “KAEKO provides advanced Engineering and Design solutions for a variety of industries.” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
24	Chemstress	Exact match	Akron, OH, United StatesHQ recorded Oct 23, 2026	51-200	86 contacts →
	Exact match “Why Chemstress?” Recorded in the RevenueBase company graph · Oct 23, 2026 · View company records in RevenueBase
25	The Sigma Group, INC	Exact match	Milwaukee, WI, United StatesHQ recorded Oct 23, 2026	51-200	85 contacts →
	Exact match “The Sigma Group (Sigma) is a 100% employee owned, award-winning consulting engineering firm headquartered in Southeastern Wisconsin.” Recorded in the RevenueBase company graph · Oct 23, 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 “conceptual studies and pre-front-end engineering design services”. 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 25 of 594 conceptual studies and pre-front-end engineering design services based in the United States

See the full list, filter by size, metro and specialty, and access 4,210 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Conceptual studies and pre-front-end engineering design services based in the United States at a glance

As of Oct 23, 2026

36.2%Verified-email coverage

19.6Average contacts per company

11-50Median size (employees)

5.1%Largest-city concentration · Houston

Oct 23, 2026Page data refreshed

Companies by employee count

1-10

290

11-50

214

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 594 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 the United States whose business descriptions match “conceptual studies and pre-front-end engineering design services” 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 4,210 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 October 23, 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.

Conceptual studies and pre-front-end engineering design services by metro

Conceptual studies and pre-front-end engineering design services in Houston30

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 “conceptual studies and pre-front-end engineering design services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many conceptual studies and pre-front-end engineering design services are there based in the United States?

RevenueBase identified 594 company matches for conceptual studies and pre-front-end engineering design services associated with the United States as of October 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?

Optimized Process Designs LLC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most conceptual studies and pre-front-end engineering design services?

Houston leads with 30 company records, followed by New York (12) and Atlanta (11).

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 4,210 professional contacts with verified work emails tracked across these 594 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 October 23, 2026.

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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.