Company lists · Data refreshed October 2026

Top 25 Geotechnical consulting firms based in Türkiye

RevenueBase identified 527 company matches for geotechnical consulting firms associated with Türkiye as of October 2026 and tracks 4,632 professional contacts across them, including 304 with verified work emails. Istanbul is the largest hub.

This list covers company matches for geotechnical consulting firms associated with Türkiye, 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 October 1, 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 Oct 1, 2026 How this list was built
527Companies
4,632Contacts tracked
304Verified emails
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The 25 largest geotechnical consulting firms based in Türkiye

Ranked by team size
Top 25 of 527 company matches for geotechnical consulting firms based in Türkiye, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 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 matchAnkara, TürkiyeHQ recorded Oct 1, 2026501-1,000253 contacts →

Exact match

“Established in 1988, KOLTEK is a technical consulting firm that offers multidisciplinary engineering services locally and abroad.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2Exact matchAnkara, TürkiyeHQ recorded Oct 1, 2026201-500188 contacts →

Exact match

“TEMELSU is a well known Turkish consulting engineering company which provides multidisciplinary engineering services, locally and internationally, since its foundation in 1969.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3Exact matchBeşiktaş, TürkiyeHQ recorded Oct 1, 2026201-500167 contacts →

Exact match

“KASKTAŞ’ın doğuşu, 1957 yılında kurulan ve günümüzde dünyanın en büyük taahhüt firmaları arasında yer alan ENKA İnşaat ve Sanayi A.Ş.’ye dayanmaktadır.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4Exact matchUmitkoy, TürkiyeHQ recorded Oct 1, 2026201-500119 contacts →

Exact match

“MEGA Engineering Consulting Inc, established in 1993, is a multidisciplinary firm that provides engineering, design, construction supervision and project management services for a…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5Exact matchAnkara, TürkiyeHQ recorded Oct 1, 2026501-1,000118 contacts →

Exact match

“IKSA Engineering Consultancy Construction Industry and Trade Inc; with its expert technical staff, numerous technological machinery and successfully concluded domestic and foreign…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6Exact matchAnkara, TürkiyeHQ recorded Oct 1, 202651-200102 contacts →

Exact match

“PROMER Müşavirlik Mühendislik A.Ş.® is an independent engineering-consultancy company offering various professional solutions and services for industries such as mining, power…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7Exact matchIstanbul, TürkiyeHQ recorded Oct 1, 202651-20052 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8Exact matchÇankaya, TürkiyeHQ recorded Oct 1, 202651-20044 contacts →

Exact match

“EFK Engineering is an engineering and design company established in 2004 in Ankara, Turkey.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9Exact matchİstanbul, TürkiyeHQ recorded Oct 1, 202651-20036 contacts →

Exact match

“HİZMET ALANLARIMIZ YÜKSEK YAPILAR ENDÜSTRİ VE ENERJİ TESİSLERİ TOPLU KONUTLAR HASTANELER TURİSTİK TESİSLER ve AVM'ler DEPREM GÜVENLİK ANALİZLERİ KENTSEL DÖNÜŞÜM PROJELERİ DİĞER…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10Exact matchAnkara, TürkiyeHQ recorded Oct 1, 202611-5032 contacts →

Exact match

“GeoDestek Zemar Ltd.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11Exact matchAnkara, TürkiyeHQ recorded Oct 1, 202611-5031 contacts →

Exact match

“AGM Mühendislik 1993 yılında Ankara'da kurulmuştur.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12Exact matchÇankaya, TürkiyeHQ recorded Oct 1, 202611-5030 contacts →

Exact match

“Ozifin is an independent, international engineering and consulting company based in Turkey, providing comprehensive solutions to the mining industry and related sectors since 2016.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13Exact matchKazan, TürkiyeHQ recorded Oct 1, 2026201-50028 contacts →

Exact match

“SONAR provides Geotechnical Construction and Engineering Services; such as Deep Excavation and Retaining Systems, Deep Foundations, Ground Improvement, Cut-Off Walls, and Ground…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14Exact matchIstanbul, TürkiyeHQ recorded Oct 1, 202611-5027 contacts →

Exact match

“Advens Mühendislik A.Ş, Türkiye’nin önemli teknoloji üslerinden biri olan Teknopark İstanbul’da, tesis güvenlik sertifikalı ofisinde tüm çalışmalarını büyük bir gizlilik ve…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15Exact matchMaltepe, TürkiyeHQ recorded Oct 1, 202611-5026 contacts →

Exact match

“Ulus Mühendislik Olarak, ÇEVRE DANIŞMANLIĞI' nda Uzman Mühendis Kadrolarımızla Hizmet Sunmaktayız.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16Exact matchIstanbul, TürkiyeHQ recorded Oct 1, 202611-5024 contacts →

Exact match

“TEM is a consulting engineering company providing civil, structural engineering, architectural design, infrastructural engineering, mechanical engineering, electrical engineering…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17Exact matchAkaretler, TürkiyeHQ recorded Oct 1, 202611-5024 contacts →

Exact match

“Erdemli Engineering and Consulting has a vivid experience of 50 years in the field of civil-structural design and is one of the pioneering Consulting – Engineering companies of…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18Exact matchAnkara, TürkiyeHQ recorded Oct 1, 202611-5021 contacts →

Exact match

“PROMOTA her biri kendi alanında 20 yıl üzerinde mühendislik tasarımları, müşavirlik ve inşaat yönetimi alanlarında gösterdiği performans ve geliştirdiği projeler ile uzmanlaşmış…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19Exact matchDilovası, TürkiyeHQ recorded Oct 1, 202651-20019 contacts →

Exact match

“Teknofor was established in and specializes about geotechnical and started to post tensioning work since 2009.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20Exact matchBeşiktaş, TürkiyeHQ recorded Oct 1, 202611-5018 contacts →

Exact match

“Büro Statik Mühendislik İnşaat San.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21Exact matchİstanbul, TürkiyeHQ recorded Oct 1, 202611-5017 contacts →

Exact match

“Modern Muhendislik was established in 2005 by Galip Topönder, who has 25 years of experience in Civil & Structural Engineering.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22Exact matchIstanbul, TürkiyeHQ recorded Oct 1, 202611-5016 contacts →

Exact match

“Orient Research Group aims to provide solutions across a wide spectrum of engineering needs.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23Exact matchAnkara, TürkiyeHQ recorded Oct 1, 202611-5016 contacts →

Exact match

“ENDECO is an engineering, design and consultancy company which was established in 2003.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24Exact matchAnkara, TürkiyeHQ recorded Oct 1, 202651-20015 contacts →

Exact match

“URAL Engineering Co.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25Exact matchKadıkoy - Istanbul, TürkiyeHQ recorded Oct 1, 202611-5014 contacts →

Exact match

“The company was first established in 1965 under the name of “Vehbi Ozden Project & Design”, mostly working in the area of reinforced concrete structural design, construction of…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

Showing 25 of 527 geotechnical consulting firms based in Türkiye

See the full list, filter by size, metro and specialty, and access 304 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Geotechnical consulting firms based in Türkiye at a glance

As of Oct 1, 2026
6.6%Verified-email coverage
8.8Average contacts per company
1-10Median size (employees)
18.4%Largest-city concentration · Istanbul
Oct 1, 2026Page data refreshed

Companies by employee count

1-10
312
11-50
137
51-200
48
201-500
21
501-1,000
8
1,001-5,000
1

Email recency for this list is measured worldwide rather than for Türkiye, so it is reported there. Company counts and contact totals on this page are exact for Türkiye, over 527 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 Türkiye whose business descriptions match “geotechnical consulting firms” 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 304 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 October 1, 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 “geotechnical consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many geotechnical consulting firms are there based in Türkiye?

RevenueBase identified 527 company matches for geotechnical consulting firms associated with Türkiye as of October 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?

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

Which city has the most geotechnical consulting firms?

Istanbul leads with 97 company records, followed by Ankara (89) and Cankaya (40).

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 304 professional contacts with verified work emails tracked across these 527 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 October 1, 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.