Company lists · Data verified August 2026

Top 25 Environmental consulting firms based in Austria

Name: Environmental consulting firms based in Austria
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 102 companies tracked

There are 102 environmental consulting firms headquartered in Austria (RevenueBase, August 2026). RevenueBase tracks 827 professional contacts across them, including 407 with verified work emails and 7 with mobile numbers. Wien is the largest hub.

This list covers environmental consulting firms headquartered in Austria, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

102Companies

827Contacts tracked

407Verified emails

7Mobile numbers

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The 25 largest environmental consulting firms based in Austria

Ranked by team size

Top 25 of 102 environmental consulting firms based in Austria, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	ILF Consulting Engineers In Austria	Raaba	501-1,000	265	158
2	CES Clean Energy Solutions	Vienna	11-50	47	29
3	Allplan Gmbh	St. Polten	51-200	38	23
4	Energie AG OÖ Umwelt Service	Wels	501-1,000	33	24
5	Posch & Partners Consulting Engineers	Innsbruck	11-50	23	6
6	Ingenos ZT Gmbh	Gleisdorf	11-50	18	10
7	ESW Consulting Wruss Ziviltechnikergesellschaft MBH	Wien	11-50	16	5
8	RM Umweltkonsulenten ZT Gmbh	Veitglan	11-50	15	12
9	Hydrophil Gmbh	Graz	11-50	14	11
10	Pulswerk Gmbh	Wien	11-50	13	8
11	Tiqu-Tiroler Qualitätszentrum FÜR Umwelt, BAU UND Rohstoffe Gmbh	Innsbruck	11-50	13	4
12	GK Consulting Gmbh	Hagenberg Im Muhlkreis	11-50	12	9
13	Tdc-Skd Gmbh	Unterpremstatten	51-200	11	6
14	Myssion Consulting Gmbh	Wien	11-50	11	6
15	Freiland ZT	Graz	11-50	11	6
16	Brainbows	Wien	11-50	9	5
17	Susform	Graz	1-10	8	7
18	Ecofides Consulting Gmbh	n/a	1-10	8	6
19	UVP Environmental Management And Engineering Gmbh	Wien	11-50	7	6
20	Consiga & Partner Consulting Gmbh	Graz	11-50	7	5
21	Unfold Consulting Gmbh	Wien	1-10	7	5
22	Filzmaier Consulting Gmbh	Irschen	11-50	6	5
23	D&e Consulting	n/a	1-10	6	2
24	Machowetz & Partner Consulting ZT Gmbh	Linz	11-50	6	1
25	Daxner & Merl Gmbh	Wien	1-10	5	4

Showing 25 of 102 environmental consulting firms based in Austria

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Environmental consulting firms based in Austria at a glance

As of Aug 28, 2026

1-10Median size (employees)

WienLargest hub · 13 HQs

7Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Environmental consulting firms by metro

Metro	Companies
Environmental consulting firms in Wien	13
Environmental consulting firms in Graz	10
Environmental consulting firms in Vienna	8
Environmental consulting firms in Innsbruck	8
Environmental consulting firms in St. Polten	2
Environmental consulting firms in St Polten	2
Environmental consulting firms in Klagenfurt	2

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “environmental consulting firms”, with match quality audited by blind human judging, and headquartered in Austria.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many environmental consulting firms are there based in Austria?

There are 102 environmental consulting firms headquartered in Austria as of August 2026 (RevenueBase).

What is the largest company on this list?

ILF Consulting Engineers In Austria, headquartered in Raaba, tops this list with the largest team on record.

Which city has the most environmental consulting firms?

Wien leads with 13 headquartered companies, followed by Graz (10) and Vienna (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 407 verified decision-maker contacts tracked across these 102 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.