Company lists · Data refreshed September 2026

Top 25 Water resources consulting firms based in Germany

Name: Water resources consulting firms based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 282 companies tracked

RevenueBase identified 282 water resources consulting firms headquartered in Germany as of September 2026 and tracks 3,111 professional contacts across them, including 1,114 with verified work emails. Berlin is the largest hub.

This list covers water resources consulting firms headquartered in Germany, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

282Companies

3,111Contacts tracked

1,114Verified emails

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The 25 largest water resources consulting firms based in Germany

Ranked by team size

Top 25 of 282 water resources consulting firms based in Germany, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to water resources consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	GKW Consult	Indirect evidence	Mannheim, GermanyHQ checked Sep 21, 2026	201-500	282 contacts →
	Indirect evidence “GKW Consult GmbH, a company of GFA Group, has developed and implemented projects and advisory services for public and private clients for 70 years in more than 50 countries…” Source: RevenueBase Database · checked Sep 21, 2026
2	HPC AG	Partial evidence	Harburg (schwaben), GermanyHQ checked Sep 21, 2026	501-1,000	252 contacts →
	Partial evidence “HPC has been working for people and their environment since 1948: we are specialist planners and experts in soil and groundwater, mineral and drinking water, building ground and…” Source: RevenueBase Database · checked Sep 21, 2026
3	Dorsch Impact Gmbh	Partial evidence	Essen, GermanyHQ checked Sep 21, 2026	51-200	200 contacts →
	Partial evidence “Dorsch Impact GmbH is an independent and reliable consulting partner for international development cooperation.” Source: RevenueBase Database · checked Sep 21, 2026
4	CES Consulting Engineers Salzgitter Gmbh	Partial evidence	Braunschweig, GermanyHQ checked Sep 21, 2026	51-200	165 contacts →
	Partial evidence “CES Consulting Engineers Salzgitter GmbH is an independent consulting engineering company with worldwide experience.” Source: RevenueBase Database · checked Sep 21, 2026
5	Björnsen Beratende Ingenieure	Indirect evidence	Koblenz, GermanyHQ checked Sep 21, 2026	201-500	107 contacts →
	Indirect evidence “Wir sind Experten für Wasser, Umwelt, Ingenieurbau, Informatik, Energie und Architektur.” Source: RevenueBase Database · checked Sep 21, 2026
6	Fichtner Management Consulting	Partial evidence	Stuttgart, GermanyHQ checked Sep 21, 2026	51-200	89 contacts →
	Partial evidence “Transformation, strategy, management and economics – FMC advises companies and investors in the energy and water industry and related sectors.” Source: RevenueBase Database · checked Sep 21, 2026
7	Hölscher	Partial evidence	Haren, GermanyHQ checked Sep 21, 2026	501-1,000	88 contacts →
	Partial evidence “Water has been our passion for more than 60 years.” Source: RevenueBase Database · checked Sep 21, 2026
8	Dahlem Beratende Ingenieure Gmbh & Co. Wasserwirtschaft KG	Indirect evidence	Essen, GermanyHQ checked Sep 21, 2026	51-200	81 contacts →
	Indirect evidence “DAHLEM is an engineering company headquartered in Essen, Germany, with offices in Darmstadt, Würzburg, Berlin, Stuttgart, Montenegro and Albania.” Source: RevenueBase Database · checked Sep 21, 2026
9	Bauer Resources Gmbh	Partial evidence	Schrobenhausen, GermanyHQ checked Sep 21, 2026	1,001-5,000	59 contacts →
	Partial evidence “Die BAUER Resources GmbH ist der Geschäftsbereich für Umweltdienstleistungen der BAUER Gruppe mit Sitz in Schrobenhausen.” Source: RevenueBase Database · checked Sep 21, 2026
10	Lindschulte Baden-Baden	Indirect evidence	Hügelsheim, GermanyHQ checked Sep 21, 2026	51-200	48 contacts →
	Indirect evidence “WALD + CORBE hat sich zu einem namhaften Ingenieurbüro mit mehreren Standorten in den Bereichen Wasserwirtschaft, Wasserbau, Infrastruktur und Ökologie + Umwelt entwickelt.” Source: RevenueBase Database · checked Sep 21, 2026
11	BIT Ingenieure AG	Indirect evidence	Karlsruhe, GermanyHQ checked Sep 21, 2026	201-500	46 contacts →
	Indirect evidence “BIT Ingenieure: Die Anlaufstelle für erstklassige Lösungen im Bereich Wasser, Verkehrs- und Stadtplanung.” Source: RevenueBase Database · checked Sep 21, 2026
12	Ingenieurbüro Fritz Spieth Beratende Ingenieure Gmbh	Indirect evidence	Esslingen, GermanyHQ checked Sep 21, 2026	51-200	35 contacts →
	Indirect evidence “Wir gestalten die Infrastruktur von morgen – mit Menschen, die etwas bewegen wollen.” Source: RevenueBase Database · checked Sep 21, 2026
13	Macs Energy & Water	Strong evidence	Frankfurt/main, GermanyHQ checked Sep 21, 2026	11-50	35 contacts →
	Strong evidence “MACS Energy & Water is an independent international consulting company, working in the field of Infrastructure Finance for Water and Sanitation as well as Energy Efficiency (EE)…” Source: RevenueBase Database · checked Sep 21, 2026
14	Consulaqua Hamburg Beratungsgesellschaft MBH	Indirect evidence	Hamburg, GermanyHQ checked Sep 21, 2026	51-200	34 contacts →
	Indirect evidence “Wasserkompetenz aus einer Hand: CONSULAQUA bietet Ingenieur- und Dienstleistungen rund um 360° Wasser!” Source: RevenueBase Database · checked Sep 21, 2026
15	Decon International Gmbh	Partial evidence	Frankfurt, GermanyHQ checked Sep 21, 2026	11-50	33 contacts →
	Partial evidence “decon international as part of the Tilia Group is a global consulting company providing engineering and consulting services for infrastructure projects in the fields of energy…” Source: RevenueBase Database · checked Sep 21, 2026
16	Dr. Pecher Gmbh	Indirect evidence	Hochdahl, GermanyHQ checked Sep 21, 2026	51-200	30 contacts →
	Indirect evidence “Die Dr.” Source: RevenueBase Database · checked Sep 21, 2026
17	Hydrotec Water And Environment Consulting Engineers Gmbh	Strong evidence	Aachen, GermanyHQ checked Sep 21, 2026	51-200	27 contacts →
	Strong evidence “Hydrotec is a consulting firm focusing on the analysis of quantitative and qualitative aspects of water resources systems and environmental issues as well as data ascertainment…” Source: RevenueBase Database · checked Sep 21, 2026
18	P2m Berlin Gmbh	Partial evidence	Berlin, GermanyHQ checked Sep 21, 2026	51-200	25 contacts →
	Partial evidence “Excellence for Water and Environment.” Source: RevenueBase Database · checked Sep 21, 2026
19	AHU Gmbh Wasser Boden Geomatik	Indirect evidence	Aachen, GermanyHQ checked Sep 21, 2026	11-50	20 contacts →
	Indirect evidence “Die ahu GmbH in Aachen ist ein international tätiges Beratungs- und Planungsunternehmen für Wasser und Boden.” Source: RevenueBase Database · checked Sep 21, 2026
20	Stein Ingenieure Gmbh	Partial evidence	Bochum, GermanyHQ checked Sep 21, 2026	51-200	20 contacts →
	Partial evidence “STEIN Ingenieure GmbH is an internationally active, independent engineering and consulting company that supports its customers in the successful implementation of technically…” Source: RevenueBase Database · checked Sep 21, 2026
21	Aqua Consult Ingenieur Gmbh	Indirect evidence	Hannover, GermanyHQ checked Sep 21, 2026	51-200	20 contacts →
	Indirect evidence “Auf den Punkt perfekt: unsere Lösungen Seit gut 50 Jahren arbeiten wir als Experten für Wasserwirtschaft und Umwelttechnik.” Source: RevenueBase Database · checked Sep 21, 2026
22	Sachsen Wasser Gmbh	Strong evidence	Leipzig, GermanyHQ checked Sep 21, 2026	11-50	20 contacts →
	Strong evidence “Sachsen Wasser GmbH (SaWa) is a specialised consulting company in the field of water supply and sanitation with a particular focus on water utility advisory and operations and…” Source: RevenueBase Database · checked Sep 21, 2026
23	Niedersachsen Wasser Kooperations- UND Dienstleistungsgesellschaft MBH	Indirect evidence	Brake, GermanyHQ checked Sep 21, 2026	11-50	20 contacts →
	Indirect evidence “Pro Wasser!” Source: RevenueBase Database · checked Sep 21, 2026
24	Ingenieurgesellschaft Heidt Peters MBH	Indirect evidence	Celle, GermanyHQ checked Sep 21, 2026	51-200	19 contacts →
	Indirect evidence “Seit 60 Jahren sind wir als Beratende Ingenieure ein leistungsstarker Partner im Tiefbau.” Source: RevenueBase Database · checked Sep 21, 2026
25	Voigt Ingenieure	Indirect evidence	Berlin, GermanyHQ checked Sep 21, 2026	51-200	19 contacts →
	Indirect evidence “Ihr Ansprechpartner für nachhaltige Infrastrukturprojekte in Berlin und Brandenburg mit einem Schwerpunkt in Ver- und Entsorgungssystemen.” Source: RevenueBase Database · checked Sep 21, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: water resources consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names water resources consulting firms.
Partial evidence: Its own public description names part of water resources consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name water resources consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 282 water resources consulting firms based in Germany

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Water resources consulting firms based in Germany at a glance

As of Sep 21, 2026

35.8%Verified-email coverage

11.0Average contacts per company

11-50Median size (employees)

3.9%Largest-city concentration · Berlin

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

132

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 282 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among water resources consulting firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Germany whose own description of what they do matches “water resources consulting firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names water resources consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among water resources consulting firms, and records with no verified work email. Companies headquartered outside Germany are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 1,114 across the full list. 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 21, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names water resources consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many water resources consulting firms are there based in Germany?

RevenueBase identified 282 water resources consulting firms headquartered in Germany as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

GKW Consult, headquartered in Mannheim, tops this list with the largest team on record.

Which city has the most water resources consulting firms?

Berlin leads with 11 headquartered companies, followed by Dresden (10) and Munchen (9).

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 1,114 verified decision-maker contacts tracked across these 282 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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 Smart Search, 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.