Company lists · Data refreshed September 2026

Top 25 Engineering outsourcing firms based in Türkiye

Name: Engineering outsourcing firms based in Türkiye
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 813 companies tracked

RevenueBase identified 813 engineering outsourcing firms headquartered in Türkiye as of September 2026 and tracks 8,712 professional contacts across them, including 1,346 with verified work emails. Istanbul is the largest hub.

This list covers engineering outsourcing 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 28, 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 28, 2026 86% judged on-target in blind review

813Companies

8,712Contacts tracked

1,346Verified emails

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The 25 largest engineering outsourcing firms based in Türkiye

Ranked by team size

Top 25 of 813 engineering outsourcing firms based in Türkiye, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to engineering outsourcing 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	Mapa Group	Partial evidence	Ankara, TürkiyeHQ checked Sep 28, 2026	10001+	959 contacts →
	Partial evidence “Mapa Group has emerged as a global leader in the engineering and construction industry, now spanning three continents.” Source: RevenueBase Database · checked Sep 28, 2026
2	Emay International Engineering And Consultancy INC	Partial evidence	Üsküdar, TürkiyeHQ checked Sep 28, 2026	1,001-5,000	641 contacts →
	Partial evidence “EMAY International Engineering and Consultancy Inc, established in 1980, is one of the leading engineering and technical consultancy companies in Turkey.” Source: RevenueBase Database · checked Sep 28, 2026
3	FEV Türkiye	Partial evidence	Istanbul, TürkiyeHQ checked Sep 28, 2026	201-500	435 contacts →
	Partial evidence “FEV Türkiye, which provides turnkey engineering solutions in the automotive industry, on vehicle development, software, autonomous driving, electric and conventional propulsion…” Source: RevenueBase Database · checked Sep 28, 2026
4	SIGMA	Indirect evidence	Besiktas, TürkiyeHQ checked Sep 28, 2026	201-500	330 contacts →
	Indirect evidence “Sigma olarak inşaat sektöründeki 30 yılı aşkın tecrübemiz ve çözüm odaklı yaklaşımımızla Türkiye'nin en güvenilir mühendislik ve danışmanlık firmaları arasında yer alıyoruz.” Source: RevenueBase Database · checked Sep 28, 2026
5	Su-Yapi Engineering & Consulting INC	Partial evidence	Ankara, TürkiyeHQ checked Sep 28, 2026	501-1,000	293 contacts →
	Partial evidence “Founded in 1964, SU-YAPI Engineering and Consulting Inc.” Source: RevenueBase Database · checked Sep 28, 2026
6	Tekfen Engineering	Partial evidence	Sisli, TürkiyeHQ checked Sep 28, 2026	201-500	293 contacts →
	Partial evidence “Tekfen Engineering was founded in 1984 to provide engineering services for our parent company, Tekfen Construction.” Source: RevenueBase Database · checked Sep 28, 2026
7	Koltek Consulting CO	Partial evidence	Ankara, TürkiyeHQ checked Sep 28, 2026	501-1,000	253 contacts →
	Partial evidence “Established in 1988, KOLTEK is a technical consulting firm that offers multidisciplinary engineering services locally and abroad.” Source: RevenueBase Database · checked Sep 28, 2026
8	Bi̇as Mühendislik	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 28, 2026	51-200	183 contacts →
	Indirect evidence “BİAS Mühendislik, 1997 yılında kurulmuştur ve makina mühendisliği disiplinlerinde ileri mühendislik çözümleri sunmaktadır.” Source: RevenueBase Database · checked Sep 28, 2026
9	Hexagon Studio	Partial evidence	Çayırova, TürkiyeHQ checked Sep 28, 2026	201-500	106 contacts →
	Partial evidence “HEXAGON STUDIO is a Turkish company established to give design and engineering services in Mobility and Defense Industries, for both OEM's and Suppliers in local and international…” Source: RevenueBase Database · checked Sep 28, 2026
10	Ottonom Engineering	Partial evidence	Bursa, TürkiyeHQ checked Sep 28, 2026	201-500	104 contacts →
	Partial evidence “Ottonom Engineering Solutions was established to increase the engineering know-how and efficiency of the Turkish industry with its unique design competence, creative identity and…” Source: RevenueBase Database · checked Sep 28, 2026
11	MC Sistem	Indirect evidence	Çankaya Mahallesi, TürkiyeHQ checked Sep 28, 2026	201-500	101 contacts →
	Indirect evidence “MCSistem elektromekanik sistem entegrasyonu yapan bir kuruluştur.” Source: RevenueBase Database · checked Sep 28, 2026
12	Stadia Engineering	Partial evidence	Çankaya, TürkiyeHQ checked Sep 28, 2026	51-200	77 contacts →
	Partial evidence “Stadia Engineering and Consultancy was established in 2018.” Source: RevenueBase Database · checked Sep 28, 2026
13	MCA Yapi	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 28, 2026	201-500	77 contacts →
	Indirect evidence “MCA Yapı, 2010 yılında mekanik ve elektrik sistemlerde yüksek kaliteli mühendislik çözümleri sunmak amacıyla kurulmuştur.” Source: RevenueBase Database · checked Sep 28, 2026
14	Demetal Kalıp VE Makine Sanayi Ticaret A.Ş	Indirect evidence	Bursa, TürkiyeHQ checked Sep 28, 2026	51-200	74 contacts →
	Indirect evidence “BİZE Grup şirketi olarak 2012 yılında kurulan DEMETAL; kalıp, fikstür ve özel makinalar konusunda iç piyasaya dolaylı yoldan da ihracat yapan Türkiye ekonomisine katkıda bulunan…” Source: RevenueBase Database · checked Sep 28, 2026
15	TIBA	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 28, 2026	51-200	61 contacts →
	Indirect evidence “TIBA is formed in 2005 to serve expanding needs of construction industry.” Source: RevenueBase Database · checked Sep 28, 2026
16	Üstünova Mühendi̇sli̇k VE Arge	Partial evidence	Gölbaşı, TürkiyeHQ checked Sep 28, 2026	51-200	57 contacts →
	Partial evidence “USTUNOVA Engineering and R&D is a distinguished engineering and software company with over a decade of proven excellence in advanced technologies.” Source: RevenueBase Database · checked Sep 28, 2026
17	Koryon Engineering & Consultancy	Partial evidence	Bornova, TürkiyeHQ checked Sep 28, 2026	11-50	55 contacts →
	Partial evidence “At A Glance;* Oil & Gas Engineering Company,* Managed by Practicing Refinery Engineers,* Engineering Expertise that Minimizes Cost & Improves Process,* Over 100 Total Project…” Source: RevenueBase Database · checked Sep 28, 2026
18	Teknik Grup Savunma Havacılık	Indirect evidence	Ankara, TürkiyeHQ checked Sep 28, 2026	201-500	48 contacts →
	Indirect evidence “Müşteri odaklılık, güvenilirlik, tarafsızlık, sorumluluk, ulaşılabilirlik ve özveri prensipleri ile yola çıkan firmamız, tüm müşterilerimize yeni teknolojileri sunarak proje…” Source: RevenueBase Database · checked Sep 28, 2026
19	Kartega UK	Indirect evidence	İstanbul, TürkiyeHQ checked Sep 28, 2026	51-200	46 contacts →
	Indirect evidence “Kartega Team welcomes you!” Source: RevenueBase Database · checked Sep 28, 2026
20	EFK Engineering	Partial evidence	Çankaya, TürkiyeHQ checked Sep 28, 2026	51-200	44 contacts →
	Partial evidence “EFK Engineering is an engineering and design company established in 2004 in Ankara, Turkey.” Source: RevenueBase Database · checked Sep 28, 2026
21	Poligon Mühendislik A.Ş	Indirect evidence	Umraniye, TürkiyeHQ checked Sep 28, 2026	11-50	35 contacts →
	Indirect evidence “Poligon Mühendislik, 3 boyutlu teknolojiler alanında uzman kadrosuyla başta savunma, havacılık ve otomotiv olmak üzere pek çok sektöre katma değerli mühendislik hizmetleri…” Source: RevenueBase Database · checked Sep 28, 2026
22	AGM Mühendislik	Indirect evidence	Ankara, TürkiyeHQ checked Sep 28, 2026	11-50	31 contacts →
	Indirect evidence “AGM Mühendislik 1993 yılında Ankara'da kurulmuştur.” Source: RevenueBase Database · checked Sep 28, 2026
23	Vega Networks	Partial evidence	Istanbul, TürkiyeHQ checked Sep 28, 2026	51-200	30 contacts →
	Partial evidence “Vega Networks is a company that offers top-notch offshore engineering services, an exclusively dedicated team of software engineers, to its clients.” Source: RevenueBase Database · checked Sep 28, 2026
24	Mittel Tozoğlu Ltd. ŞTI	Indirect evidence	Alavardı, TürkiyeHQ checked Sep 28, 2026	11-50	30 contacts →
	Indirect evidence “2005 Yılında Mühendislik Hizmetleri vermek üzere kurulan şirketimiz bugün 40 mühendisten oluşan güçlü teknik yapısı, 18 yıllık ulusal iş tecrübesi ve binlerle mutlu referansı ile…” Source: RevenueBase Database · checked Sep 28, 2026
25	RMC Mühendislik	Indirect evidence	Istanbul, TürkiyeHQ checked Sep 28, 2026	11-50	29 contacts →
	Indirect evidence “Firmamız, 1990 yılında mühendislik hizmeti vermek ve kendi tasarımı mühendislik ürünlerini üretmek amacıyla kurulmuştur.” Source: RevenueBase Database · checked Sep 28, 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: engineering outsourcing 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 engineering outsourcing firms.
Partial evidence: Its own public description names part of engineering outsourcing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering outsourcing 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 813 engineering outsourcing firms based in Türkiye

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Engineering outsourcing firms based in Türkiye at a glance

As of Sep 28, 2026

15.4%Verified-email coverage

10.7Average contacts per company

1-10Median size (employees)

18.6%Largest-city concentration · Istanbul

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

446

11-50

272

51-200

201-500

501-1,000

1,001-5,000

10001+

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 813 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 engineering outsourcing 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 “engineering outsourcing 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 engineering outsourcing 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 engineering outsourcing 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, 1,346 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 28, 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.

Engineering outsourcing firms by metro

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 engineering outsourcing 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 engineering outsourcing firms are there based in Türkiye?

RevenueBase identified 813 engineering outsourcing 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?

Mapa Group, headquartered in Ankara, tops this list with the largest team on record.

Which city has the most engineering outsourcing firms?

Istanbul leads with 151 headquartered companies, followed by Ankara (110) and Bursa (44).

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 1,346 verified decision-maker contacts tracked across these 813 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 28, 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.