Company lists · Data refreshed September 2026

Top 25 Retrofit consultants worldwide

Name: Retrofit consultants worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 26,817 companies tracked

RevenueBase identified 26,817 company matches for retrofit consultants worldwide as of September 2026 and tracks 270,143 professional contacts across them, including 88,307 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for retrofit consultants worldwide, 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 29, 2026. Country and city lists for retrofit consultants follow the table.

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 29, 2026 How this list was built

26,817Companies

270,143Contacts tracked

88,307Verified emails

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The 25 largest retrofit consultants worldwide

Ranked by team size

Top 25 of 26,817 company matches for retrofit consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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	Sargent & Lundy	Exact match	Chicago, WY, United StatesHQ recorded Sep 29, 2026	1,001-5,000	4,156 contacts →
	Exact match “Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	KEO International Consultants	Exact match	Safat, KuwaitHQ recorded Sep 29, 2026	1,001-5,000	3,038 contacts →
	Exact match “From shaping iconic skylines to crafting sustainable communities, KEO builds legacies for a better tomorrow.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Langan Engineering & Environmental Services	Exact match	Parsippany, NJ, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,177 contacts →
	Exact match “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	IMEG	Exact match	Rock Island, IL, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,985 contacts →
	Exact match “Leaders in Engineering and Innovation.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Atwell, LLC	Exact match	Southfield, MI, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,290 contacts →
	Exact match “Atwell is a full-service consulting, engineering and construction services firm that delivers a broad range of creative solutions to clients in the real estate and land…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	OLA	Exact match	Austin, TX, United StatesHQ recorded Sep 29, 2026	n/a	1,145 contacts →
	Exact match “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	Zuhair Fayez	Exact match	Riyadh, Saudi ArabiaHQ recorded Sep 29, 2026	1,001-5,000	1,113 contacts →
	Exact match “Zuhair Fayez stands as the region's foremost engineering and consulting firm, renowned for our innovative approach in architecture, project management, and oil and gas services.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	Hoare LEA	Exact match	London, United KingdomHQ recorded Sep 29, 2026	501-1,000	1,103 contacts →
	Exact match “We are an award-winning engineering consultancy with a creative team of engineers, designers, and technical specialists.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	BTP Consultants	Exact match	Montigny-le-bretonneux, FranceHQ recorded Sep 29, 2026	201-500	1,066 contacts →
	Exact match “BTP Consultants est un bureau de ̂, et présent à l'échelle nationale depuis plus de.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Granlund	Exact match	Helsinki, FinlandHQ recorded Sep 29, 2026	1,001-5,000	1,027 contacts →
	Exact match “Granlund on voimakkaasti kasvava kiinteistö- ja rakennusalan asiantuntijayhtiö.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	Affiliated Engineers, INC	Exact match	Madison, WI, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,012 contacts →
	Exact match “Affiliated Engineers, Inc.(AEI) provides engineering leadership and whole-mission solutions for complex building, energy, and utility projects.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Mapa Group	Exact match	Ankara, TürkiyeHQ recorded Sep 29, 2026	10001+	959 contacts →
	Exact match “Mapa Group has emerged as a global leader in the engineering and construction industry, now spanning three continents.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Simpson Gumpertz & Heger SGH	Exact match	Waltham, MA, United StatesHQ recorded Sep 29, 2026	501-1,000	942 contacts →
	Exact match “Simpson Gumpertz & Heger (SGH) is a national engineering firm committed to delivering holistic advice for our clients’ most complex challenges.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	BPA	Exact match	Montréal, QC, CanadaHQ recorded Sep 29, 2026	1,001-5,000	882 contacts →
	Exact match “IMPACTFUL ENGINEERING At BPA, it’s simple: we are building experts.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Robert Bird Group	Exact match	Brisbane, AustraliaHQ recorded Sep 29, 2026	501-1,000	872 contacts →
	Exact match “Robert Bird Group (RBG), member of the Surbana Jurong Group, is a specialist structural, civil and construction engineering consultancy with over 800 employees across 12 offices…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	ARE OY	Exact match	Vantaa, FinlandHQ recorded Sep 29, 2026	1,001-5,000	851 contacts →
	Exact match “Dedicated to engineering a better life for your building.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Introba	Exact match	St Louis, MO, United StatesHQ recorded Sep 29, 2026	1,001-5,000	822 contacts →
	Exact match “Introba is one of the world’s largest building engineering and consulting firms with more than employees in offices across the United States, Canada, the United Kingdom, Serbia…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Syska Hennessy Group	Exact match	New York, United StatesHQ recorded Sep 29, 2026	501-1,000	803 contacts →
	Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Archetype Group	Exact match	Ho Chi Minh City, VietnamHQ recorded Sep 29, 2026	1,001-5,000	801 contacts →
	Exact match “Archetype Group is a leading international construction consultancy company, we are shaping buildings that last with a full range of consulting services: Architecture & Master…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Freyssinet Saudi Arabia	Exact match	Jeddah, Saudi ArabiaHQ recorded Sep 29, 2026	1,001-5,000	784 contacts →
	Exact match “FREYSSINET SAUDI ARABIA CO.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Concrejato Engenharia	Exact match	São Paulo, BrazilHQ recorded Sep 29, 2026	1,001-5,000	765 contacts →
	Exact match “Criada na década de 1970, a Concrejato é especializada na execução de serviços técnicos de retrofit e restauro de edificações, recuperação e reforço estrutural, obras industriais…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	RJC Engineers	Exact match	Vancouver, BC, CanadaHQ recorded Sep 29, 2026	501-1,000	745 contacts →
	Exact match “We are on a mission to futureproof North America.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	PAE	Exact match	Portland, OR, United StatesHQ recorded Sep 29, 2026	201-500	744 contacts →
	Exact match “PAE provides mechanical and electrical engineering design, technology system design, energy modeling and analysis, and more.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Smith Andersen	Exact match	Toronto, ON, CanadaHQ recorded Sep 29, 2026	501-1,000	672 contacts →
	Exact match “What does it take to be one of Canada’s most respected integrated engineering firms?” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Arif & Bintoak	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 29, 2026	501-1,000	644 contacts →
	Exact match “Arif & Bintoak Consulting Architects and Engineers was established in 1975 by civil engineers Mr.” Recorded in the RevenueBase company graph · Sep 29, 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 “retrofit consultants”. 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 26,817 retrofit consultants worldwide

See the full list, filter by size, metro and specialty, and access 88,307 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Retrofit consultants worldwide at a glance

As of Sep 29, 2026

32.7%Verified-email coverage

10.1Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · Sao Paulo

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

16,141

11-50

8,061

51-200

1,905

201-500

322

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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.
Coverage: Every country. Country and city lists for retrofit consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “retrofit consultants” 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. 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 88,307 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 29, 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.

Retrofit consultants by location

111 lists · largest first

Every Retrofit consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 “retrofit consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many retrofit consultants are there worldwide?

RevenueBase identified 26,817 company matches for retrofit consultants worldwide 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?

Sargent & Lundy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most retrofit consultants?

The United States leads with 4,306 companies, followed by Brazil (2,216) and France (1,927). Every retrofit consultants list by country and city is linked on this page.

Which city has the most retrofit consultants?

Sao Paulo leads with 455 company records, followed by London (243) and Paris (200).

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 88,307 professional contacts with verified work emails tracked across these 26,817 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 29, 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.