Company lists · Data refreshed September 2026

Top 18 Geothermal reservoir engineering firms based in Türkiye

RevenueBase identified 124 geothermal reservoir engineering firms headquartered in Türkiye as of September 2026 and tracks 943 professional contacts across them, including 82 with verified work emails. Ankara is the largest hub.

This list covers geothermal reservoir engineering firms headquartered in Türkiye, 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 16, 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 16, 2026 86% judged on-target in blind review
124Companies
943Contacts tracked
82Verified emails
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The 18 largest geothermal reservoir engineering firms based in Türkiye

Ranked by team size
Top 18 of 124 geothermal reservoir engineering firms based in Türkiye, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to geothermal reservoir engineering 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceAnkara, TürkiyeHQ checked Sep 16, 20261,001-5,000124 contacts →

Indirect evidence

“Bilgi birikimini yatırıma ve tasarrufa dönüştürmek için çalışmalarını 1990 yılından bu yana sürdüren Doğan Jeotermal Group ülkemizin sahip olduğu jeotermal enerji kaynaklarını…”

Source: RevenueBase Database · checked Sep 16, 2026
2Partial evidenceÇankaya, TürkiyeHQ checked Sep 16, 202611-5030 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 16, 2026
3Partial evidenceBayraklı, TürkiyeHQ checked Sep 16, 202611-5028 contacts →

Partial evidence

“GMK Energy is a world leader consulting, engineering and project development company which gives engineering, project design, consultancy, owner's engineering and integrated…”

Source: RevenueBase Database · checked Sep 16, 2026
4Indirect evidenceAnkara, TürkiyeHQ checked Sep 16, 202611-5013 contacts →

Indirect evidence

“Bünyesinde jeoloji, maden ve çevre mühendisliğinin yanı sıra çeşitli disiplinlerden oluşan tecrübeli uzman kadrosu ile her geçen gün büyümeye devam eden FİDES MÜHENDİSLİK…”

Source: RevenueBase Database · checked Sep 16, 2026
5Indirect evidenceAnkara, TürkiyeHQ checked Sep 16, 202611-5012 contacts →

Indirect evidence

“FNÇ Mühendislik yerbilimleri konusundaki deneyimi ve bilgi birikimi ile mühendislik ve danışmanlık hizmeti vermek amacı ile kurulmuştur.”

Source: RevenueBase Database · checked Sep 16, 2026
6Indirect evidenceIstanbul, TürkiyeHQ checked Sep 16, 202651-20011 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
7Partial evidenceCankaya, TürkiyeHQ checked Sep 16, 202611-5011 contacts →

Partial evidence

“INR provides worldwide consulting and engineering services especially in mining projects mainly associated with geological, geotechnical, and hydraulic engineering disciplines.”

Source: RevenueBase Database · checked Sep 16, 2026
8Partial evidenceAnkara, TürkiyeHQ checked Sep 16, 202651-20010 contacts →

Partial evidence

“We supply clients with geophysical services to help them achieve greater success in finding, developing, managing hydrocarbon reservoirs and mineral deposits.”

Source: RevenueBase Database · checked Sep 16, 2026
9Indirect evidenceİstanbul, TürkiyeHQ checked Sep 16, 202651-2008 contacts →

Indirect evidence

“Innovative, Clean & Feasible Energy Solutions for the People Enprode is a global firm and our philosophy is to bring global reach and local capabilities and experience to bear in…”

Source: RevenueBase Database · checked Sep 16, 2026
10Partial evidenceÇankaya, TürkiyeHQ checked Sep 16, 20261-106 contacts →

Partial evidence

“KRATİS, which carries out the engineering, project management and site services processes with more than 20 years of experience, offers its customers effective, efficient, and…”

Source: RevenueBase Database · checked Sep 16, 2026
11Indirect evidenceGolbasi, TürkiyeHQ checked Sep 16, 202611-504 contacts →

Indirect evidence

“NEOS Group Inc.”

Source: RevenueBase Database · checked Sep 16, 2026
12Indirect evidenceAnkara, TürkiyeHQ checked Sep 16, 20261-104 contacts →

Indirect evidence

“CubicGEO Firması kurucuları Mert CÜYLAN ve M.Melih TAŞKIN Hacettepe Üniversitesi Hidrojeoloji Bölümünden mezun olduktan sonra 2006 yılından itibaren sektördeki lider kuruluşlarda…”

Source: RevenueBase Database · checked Sep 16, 2026
13Indirect evidenceAnkara, TürkiyeHQ checked Sep 16, 20261-104 contacts →

Indirect evidence

“BS Dağıtık Enerji Sistemleri | Yenilenebilir Enerjide 25+ Yıl Uzmanlık Sürdürülebilir ve güvenli bir enerji geleceği için dağıtık enerji sistemleri artık bir tercih değil…”

Source: RevenueBase Database · checked Sep 16, 2026
14Partial evidenceEtimesgut, TürkiyeHQ checked Sep 16, 20261-104 contacts →

Partial evidence

“Teori Earth Sciences is an engineering and consultancy firm that aims to offer geological, hydrogeological, and environmental solutions at national and international standards…”

Source: RevenueBase Database · checked Sep 16, 2026
15Strong evidenceAydın, TürkiyeHQ checked Sep 16, 20261-103 contacts →

Strong evidence

“Enigma Engineering Solutions is an independent consultancy company which was found in 2023 in Turkey for the oil, gas & geothermal exploration & production industry.”

Source: RevenueBase Database · checked Sep 16, 2026
16Partial evidenceAnkara, TürkiyeHQ checked Sep 16, 20261-102 contacts →

Partial evidence

Geothermal & Mining Survey -MT & (Magnetotelluric) Data acuasition & processing & interpretation -Gravity Data acuasition & processing & interpretation -Magnetic Data acuasition &…”

Source: RevenueBase Database · checked Sep 16, 2026
17Indirect evidenceIstanbul, TürkiyeHQ checked Sep 16, 20261-102 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 16, 2026
18Indirect evidenceAnkara, TürkiyeHQ checked Sep 16, 20261-101 contacts →

Indirect evidence

“Pro-En-Co yurt içi ve yurt dışında yürütülen enerji projelerinin (HES-RES-GES) planlama, proje, inşaat, işletme ve devir aşamalarında mühendislik ve müşavirlik hizmetleri…”

Source: RevenueBase Database · checked Sep 16, 2026

Showing 18 of 124 geothermal reservoir engineering firms based in Türkiye

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Geothermal reservoir engineering firms based in Türkiye at a glance

As of Sep 16, 2026
8.7%Verified-email coverage
7.6Average contacts per company
1-10Median size (employees)
24.2%Largest-city concentration · Ankara
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
73
11-50
31
51-200
12
201-500
3
501-1,000
2
1,001-5,000
3

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 124 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 geothermal reservoir engineering 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 Türkiye whose own description of what they do matches “geothermal reservoir engineering 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 geothermal reservoir engineering 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 geothermal reservoir engineering firms, and records with no verified work email. Companies headquartered outside Türkiye 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, 82 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 16, 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.

Geothermal reservoir engineering firms by metro

  • Geothermal reservoir engineering firms in Ankara30

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 geothermal reservoir engineering 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 geothermal reservoir engineering firms are there based in Türkiye?

RevenueBase identified 124 geothermal reservoir engineering firms headquartered in Türkiye 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?

Doğan Jeotermal Group, headquartered in Ehlibeyt Mahallesi, tops this list with the largest team on record.

Which city has the most geothermal reservoir engineering firms?

Ankara leads with 30 headquartered companies, followed by Cankaya (18) and Izmir (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 82 verified decision-maker contacts tracked across these 124 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 16, 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.