Company lists · Data refreshed September 2026

Top 25 Hydrogeological consultants based in London, United Kingdom

RevenueBase identified 192 company matches for hydrogeological consultants associated with London, United Kingdom as of September 2026 and tracks 8,971 professional contacts across them, including 3,059 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers company matches for hydrogeological consultants associated with London, United Kingdom, 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 21, 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 Sep 21, 2026 How this list was built
192Companies
8,971Contacts tracked
3,059Verified emails
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The 25 largest hydrogeological consultants based in London, United Kingdom

Ranked by team size
Top 25 of 192 company matches for hydrogeological consultants based in London, United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 21, 20265,001-10,0003,960 contacts →

Exact match

“Every day, people around the world live, work and play on ground prepared by Keller, the world's largest geotechnical specialist contractor.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 21, 2026501-1,0001,103 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 21, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Sep 21, 20261,001-5,000670 contacts →

Exact match

“Click the 'Follow' button and explore careers at Ricardo on our 'Jobs' and 'Life' tabs and at careers.ricardo.com.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 21, 20261,001-5,000563 contacts →

Exact match

“Waterman Group is a multidisciplinary consultancy providing sustainable solutions to meet the planning, engineering design and project delivery needs of the property…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-200176 contacts →

Exact match

“Founded in 2015, Juru is an international engineering and consultancy firm with a mission to solve engineering and environmental problems.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-200133 contacts →

Exact match

“Meinhardt (UK) is a leading international multidisciplinary engineering consultancy.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-200113 contacts →

Exact match

“CampbellReith is an independent firm of consulting engineers providing structural, civil, geotechnical, land quality, development planning and transport planning services.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-200110 contacts →

Exact match

“Walsh is a B Corp Certified structural, civil and geotechnical engineering consultancy specialising in complex developments on constrained urban sites.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-50103 contacts →

Exact match

“Established in the UK in 1986, MRAG Ltd is a consultancy company dedicated to promoting sustainable use of aquatic resources through sound integrated management policies and…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Sep 21, 2026201-50091 contacts →

Exact match

“In 2019, Hurley Palmer Flatt, the UK’s leading independent multidisciplinary engineering consultancy, joined global design firm HDR.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20086 contacts →

Exact match

“FHP Group is a leading Mechanical, Electrical, Public Health, Energy and Sustainability engineering consultancy with over 50 years of experience!”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20063 contacts →

Exact match

“Dr.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20058 contacts →

Exact match

“OPC is a leading global energy consultancy specialising in providing clients with top-tier expertise and innovative solutions across the upstream E&P, Gas and CO2 storage domains…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5051 contacts →

Exact match

“WBD Group is a leading multidisciplinary engineering consultancy based in Central London.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 21, 2026n/a50 contacts →

Exact match

“RGA was established with a clear purpose: to enhance the performance of the UK water sector through business change enabled by technology.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20048 contacts →

Exact match

“VEDA Associates is an independent, multidisciplinary engineering consultancy driven by a passion for problem solving and technical excellence.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20048 contacts →

Exact match

“We are an international Engineering consultant with a team of over 40 chartered engineers, environmentalists, Maritime experts, and technicians across West Africa, UK, and…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20042 contacts →

Exact match

“OTB is renowned for its expertise and experience in tunnel, construction and geotechnical engineering, and rail assurance.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5041 contacts →

Exact match

“A dynamic international engineering consultancy company providing project management, technical assistance, capacity-building and design services for the development of…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5038 contacts →

Exact match

“LBA is an engineering consultancy specialising in tunnelling, underground works and heavy civil engineering construction.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 21, 202651-20032 contacts →

Exact match

“TB Associates was founded in the United Kingdom in 2004 and is a research-based engineering consultancy company.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5029 contacts →

Exact match

“Solis Marine was established in 2012 to provide independent expert technical services to the shipping and wider maritime industries.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5029 contacts →

Exact match

“Geotechnical Consulting Group (GCG) is one of the world’s leading independent geotechnical engineering consultancies, recognised for delivering innovative, research driven…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5028 contacts →

Exact match

“Twin and Earth is an independent engineering and sustainability consultancy.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 21, 202611-5028 contacts →

Exact match

“Data-driven geosolutions to ensure ground risks are mitigated and design opportunities are realised.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 192 hydrogeological consultants based in London, United Kingdom

See the full list, filter by size, metro and specialty, and access 3,059 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Hydrogeological consultants based in London, United Kingdom at a glance

As of Sep 21, 2026
34.1%Verified-email coverage
46.7Average contacts per company
1-10Median size (employees)
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
113
11-50
53
51-200
17
201-500
1
501-1,000
3
1,001-5,000
3
5,001-10,000
1

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 192 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 London, United Kingdom whose business descriptions match “hydrogeological 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. 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 3,059 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 21, 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.

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

How many hydrogeological consultants are there based in London, United Kingdom?

RevenueBase identified 192 company matches for hydrogeological consultants associated with London, United Kingdom 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?

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

Which city in the United Kingdom has the most hydrogeological consultants?

London leads the United Kingdom with 192 company records, followed by Aberdeen (45) and Glasgow (27).

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 3,059 professional contacts with verified work emails tracked across these 192 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 21, 2026.

Ready to reach these companies? Verified emails and direct dials for all 192 hydrogeological consultants based in London, United Kingdom. Start with a free account, no credit card.

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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.