Company lists · Data refreshed November 2026

Top 25 Indoor environmental consultants worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 8,237 companies tracked

RevenueBase identified 8,237 company matches for indoor environmental consultants worldwide as of November 2026 and tracks 73,211 professional contacts across them, including 24,092 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for indoor environmental 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 November 6, 2026. Country and city lists for indoor environmental 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 Nov 6, 2026 How this list was built

8,237Companies

73,211Contacts tracked

24,092Verified emails

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The 25 largest indoor environmental consultants worldwide

Ranked by team size

Top 25 of 8,237 company matches for indoor environmental consultants worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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	DGE Danmark	Exact match	Højbjerg, DenmarkHQ recorded Nov 6, 2026	n/a	1,192 contacts →
	Exact match “Miljø er vores kernekompetence og vores ansvar.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Alliance Technical Group	Exact match	Decatur, PA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,088 contacts →
	Exact match “Alliance is a new kind of environmental services company-powered by innovation, focused on service, and committed to client success.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	IEA	Exact match	Brooklyn Park, MN, United StatesHQ recorded Nov 6, 2026	n/a	1,013 contacts →
	Exact match “The Institute for Environmental Assessment, Inc.(IEA) is small business committed to providing trusted environmental safety consulting services for private and public…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	ATC Group Services LLC	Exact match	Lafayette, MA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	876 contacts →
	Exact match “ATC Group Services LLC is now Atlas.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Pinchin In Canada	Exact match	Mississauga, ON, CanadaHQ recorded Nov 6, 2026	1,001-5,000	693 contacts →
	Exact match “Pinchin Ltd.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Antea Group USA	Exact match	St. Paul, MD, United StatesHQ recorded Nov 6, 2026	1,001-5,000	649 contacts →
	Exact match “Antea Group is an international engineering and environmental consulting firm specializing in full-service solutions in the fields of environment, health and safety, and…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	EBI Consulting	Exact match	Burlington, CA, United StatesHQ recorded Nov 6, 2026	501-1,000	553 contacts →
	Exact match “EBI Consulting is a national environmental and engineering consulting firm helping asset owners, investors, lenders, operators, and telecom infrastructure providers protect value…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	ROUX	Exact match	Islandia, NY, United StatesHQ recorded Nov 6, 2026	201-500	474 contacts →
	Exact match “The Roux organization applies sophisticated scientific, technical, and managerial resources to develop and implement effective, efficient, and sustainable solutions to our…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Groundwater & Environmental Services, INC	Exact match	Wall Township, VA, United StatesHQ recorded Nov 6, 2026	201-500	470 contacts →
	Exact match “We are Groundwater & Environmental Services, Inc, better known as GES.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Glumac	Exact match	San Francisco, NV, United StatesHQ recorded Nov 6, 2026	201-500	387 contacts →
	Exact match “Glumac, a Tetra Tech Company, is a global leader in building engineering, committed to delivering a low carbon future for all.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	P2s	Exact match	Long Beach, CA, United StatesHQ recorded Nov 6, 2026	201-500	379 contacts →
	Exact match “P2S has brought forward-thinking, sustainable engineering solutions to the West Coast and beyond for over 35 years.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	ADX Groupe	Exact match	Château-gontier, FranceHQ recorded Nov 6, 2026	201-500	370 contacts →
	Exact match “ADX Groupe, votre bureau d'études de l'existant - Réalisation de diagnostics immobiliers obligatoires lors de la transaction ou location des biens- Recherche d’amiante dans tous…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Avant Garde Cleanroom & Engg. Solutions Pvt. LTD	Exact match	New Delhi, IndiaHQ recorded Nov 6, 2026	501-1,000	341 contacts →
	Exact match “Designing and building clean indoor climates for critical manufacturing industries like Pharmaceutical, Food, Automotive, Electronics, and others, ACES has innovated its way to…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Atelier TEN	Exact match	London, United KingdomHQ recorded Nov 6, 2026	51-200	313 contacts →
	Exact match “As environmental design consultants, building services engineers and lighting designers, we are committed to high performance and sustainable design within the built environment.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Colt International	Exact match	Petersfield, United KingdomHQ recorded Nov 6, 2026	1,001-5,000	307 contacts →
	Exact match “Since 1931 we have been harnessing the natural elements to provide healthy, comfortable and safe working and living conditions in buildings.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	GSI Environmental INC	Exact match	Houston, CA, United StatesHQ recorded Nov 6, 2026	201-500	281 contacts →
	Exact match “GSI Environmental, Inc.(GSI), is an environmental engineering and science consulting firm committed to measuring, analyzing, and solving complex environmental problems around the…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Environmental Works, INC	Exact match	Springfield, AR, United StatesHQ recorded Nov 6, 2026	201-500	245 contacts →
	Exact match “Environmental Works, Inc.(EWI) offers truly comprehensive environmental solutions for a variety of industries, businesses, and municipalities.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Igienair	Exact match	Achères, FranceHQ recorded Nov 6, 2026	501-1,000	240 contacts →
	Exact match “IGIENAIR : Spécialiste dans la maitrise et la surveillance de la Qualité de l'Air Intérieur (QAI)!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Dansk Miljørådgivning A S	Exact match	Silkeborg, DenmarkHQ recorded Nov 6, 2026	201-500	240 contacts →
	Exact match “Dansk Miljørådgivning A/S (DMR) er et rådgivende ingeniørfirma, der yder rådgivning indenfor bl.a:* forureningsundersøgelser og udarbejdelse af risikovurderinger.* oprensning af…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Grupo Oikos Brasil	Exact match	São Paulo, BrazilHQ recorded Nov 6, 2026	501-1,000	228 contacts →
	Exact match “O Grupo Oikos estabelece um novo padrão de atendimento em serviços com soluções ambientais capazes de criar o verdadeiro conforto de seus usuários, aliando conhecimento técnico em…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Geoambiente Geologia E Engenharia Ambiental	Exact match	Fazenda Rio Grande, BrazilHQ recorded Nov 6, 2026	51-200	226 contacts →
	Exact match “A GEOAMBIENTE Geologia e Engenharia Ambiental atua no Gerenciamento de Áreas Contaminadas provendo soluções em Diagnóstico de Passivos Ambientais e Remediação de Solo e Água…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Serviparamo S.A.S	Exact match	Barranquilla, ColombiaHQ recorded Nov 6, 2026	201-500	218 contacts →
	Exact match “Somos una empresa líder en el sector del aire acondicionado, ventilación mecánica, automatización y control, mantenimiento, retrofit, asesoría y soluciones para grantizar calidad…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Hillmann Consulting, LLC	Exact match	Union, OR, United StatesHQ recorded Nov 6, 2026	201-500	216 contacts →
	Exact match “Hillmann has been a well-recognized leader in the Environmental Health & Safety, Due Diligence & Remediation Management, and Construction Services industries since 1985.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	August Mack Environmental, INC	Exact match	Indianapolis, IN, United StatesHQ recorded Nov 6, 2026	51-200	199 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Kemron Environmental Services	Exact match	Atlanta, IL, United StatesHQ recorded Nov 6, 2026	201-500	198 contacts →
	Exact match “With more than 50 years of excellence, KEMRON Environmental Services, Inc.” Recorded in the RevenueBase company graph · Nov 6, 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 “indoor environmental 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 8,237 indoor environmental consultants worldwide

See the full list, filter by size, metro and specialty, and access 24,092 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Indoor environmental consultants worldwide at a glance

As of Nov 6, 2026

32.9%Verified-email coverage

8.9Average contacts per company

1-10Median size (employees)

0.8%Largest-city concentration · Sao Paulo

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

5,212

11-50

2,342

51-200

481

201-500

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 indoor environmental consultants are linked below.
What qualifies: Company records worldwide whose business descriptions match “indoor environmental 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 24,092 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 November 6, 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.

Indoor environmental consultants by location

38 lists · largest first

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

How many indoor environmental consultants are there worldwide?

RevenueBase identified 8,237 company matches for indoor environmental consultants worldwide as of November 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?

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

Which country has the most indoor environmental consultants?

The United States leads with 2,827 companies, followed by Brazil (550) and France (533). Every indoor environmental consultants list by country and city is linked on this page.

Which city has the most indoor environmental consultants?

Sao Paulo leads with 70 company records, followed by Houston (48) and New York (45).

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 24,092 professional contacts with verified work emails tracked across these 8,237 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 November 6, 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.