Company lists · Data refreshed September 2026

Top 25 Refinery engineering firms based in Qatar

Name: Refinery engineering firms based in Qatar
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 69 companies tracked

RevenueBase identified 69 refinery engineering firms headquartered in Qatar as of September 2026 and tracks 4,461 professional contacts across them, including 409 with verified work emails. Doha is the largest hub.

This list covers refinery engineering firms headquartered in Qatar, 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 17, 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 17, 2026 86% judged on-target in blind review

69Companies

4,461Contacts tracked

409Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest refinery engineering firms based in Qatar

Ranked by team size

Top 25 of 69 refinery engineering firms based in Qatar, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to refinery 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Medgulf Construction Co. WLL	Indirect evidence	Doha, QatarHQ checked Sep 17, 2026	1,001-5,000	1,076 contacts →
	Indirect evidence “Medgulf Construction Company ( W.L.L.) is wholly owned Qatari Company established in September 1975.” Source: RevenueBase Database · checked Sep 17, 2026
2	Petrotec	Indirect evidence	Doha, QatarHQ checked Sep 17, 2026	501-1,000	496 contacts →
	Indirect evidence “Petroleum Technology Company W.L.L (Petrotec) is one of the largest providers of Engineered products and services to the energy industry in Qatar, specializing in key diverse…” Source: RevenueBase Database · checked Sep 17, 2026
3	Black CAT Engineering & Construction W.L.L	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	1,001-5,000	401 contacts →
	Partial evidence “Black Cat Engineering & Construction WLL (BCEC) has been serving the industry in Qatar for three decades.” Source: RevenueBase Database · checked Sep 17, 2026
4	China Eleventh Chemical Construction Co., LTD	Indirect evidence	Fereej Al Manseer, QatarHQ checked Sep 17, 2026	1,001-5,000	162 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
5	SNC Lavalin Profac Gulf Management	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	146 contacts →
	Partial evidence “Founded in 1911, SNC-Lavalin is one of the leading engineering and construction groups in the world and a major player in the ownership of infrastructure.” Source: RevenueBase Database · checked Sep 17, 2026
6	Egec 1986	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	135 contacts →
	Partial evidence “EGEC Qatar is a leading multidisciplinary engineering consulting firm, specializing in design, construction supervision, and project management.” Source: RevenueBase Database · checked Sep 17, 2026
7	AL Kashaf International For Design & Engineering Consultancy	Partial evidence	Zone 23, QatarHQ checked Sep 17, 2026	51-200	69 contacts →
	Partial evidence “AlKashaf Consulting is a strong foundation and one of the top engineering design and consultation companies, AlKashaf services cover all stages of project’s work plan, from the…” Source: RevenueBase Database · checked Sep 17, 2026
8	Dime International Mechanical Engineering	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	201-500	63 contacts →
	Partial evidence “DIME International Mechanical Engineering Co.” Source: RevenueBase Database · checked Sep 17, 2026
9	Carbon Blue Global	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	63 contacts →
	Partial evidence “We are a customer obsessed global design & engineering services consulting firm.” Source: RevenueBase Database · checked Sep 17, 2026
10	Qatar Construction Technique CO W.L.L. - Qctc	Indirect evidence	Ar Rayyān, QatarHQ checked Sep 17, 2026	501-1,000	61 contacts →
	Indirect evidence “Qatar Construction Technique Co WLL (QCTC) is one of the leading companies in the sector of specialized contracting services companies in the State of Qatar.” Source: RevenueBase Database · checked Sep 17, 2026
11	Jaidah Energy	Indirect evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	61 contacts →
	Indirect evidence “Jaidahenergy LLC is a leading provider of services, products and solutions for the energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
12	Peninsular Petrotech Engineering WLL	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	501-1,000	60 contacts →
	Partial evidence “Peninsular Petrotech Engineering W.L.L (PPE), a member of Teyseer Group of Companies and headquartered in Doha, is a 100% Qatari Company operating since 1982 as a leading…” Source: RevenueBase Database · checked Sep 17, 2026
13	Essential Systems & Services ESS Middle East	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	57 contacts →
	Partial evidence “Essential Systems & Services (ESS - Middle East) is an ISO 9001:2015 certified engineering services company based in Doha, Qatar for Middle East operations to provide…” Source: RevenueBase Database · checked Sep 17, 2026
14	Htco Hany Tawfik Consulting Office	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	55 contacts →
	Partial evidence “HTCO is a leading Grade (A) Engineering Consultancy and Supervision office operating in the Middle East for more than 25 years.” Source: RevenueBase Database · checked Sep 17, 2026
15	Asco Qatar Consulting Engineers	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	43 contacts →
	Partial evidence “With a rich heritage spanning since 1975, we are a leading engineering firm in Qatar.” Source: RevenueBase Database · checked Sep 17, 2026
16	Al-Fereej Consultancy & Designs	Indirect evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	32 contacts →
	Indirect evidence “Who we are?” Source: RevenueBase Database · checked Sep 17, 2026
17	Alsadd Consulting Engineering	Partial evidence	Zone 23, QatarHQ checked Sep 17, 2026	51-200	31 contacts →
	Partial evidence “ALSADD Consulting Engineering is a leading provider of comprehensive design and engineering services in Qatar.” Source: RevenueBase Database · checked Sep 17, 2026
18	Amec ART Mark Engineering Consultant	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	31 contacts →
	Partial evidence “Art Mark Engineering Consultant "AMEC" was established in 2007 and has evolved into one of the leading engineering consulting companies in Qatar & Egypt in the areas of…” Source: RevenueBase Database · checked Sep 17, 2026
19	IMC	Partial evidence	Zone 83, QatarHQ checked Sep 17, 2026	201-500	27 contacts →
	Partial evidence “IMC a special steel structure contractor in the world of engineering, fabrication, and construction in the GCC.” Source: RevenueBase Database · checked Sep 17, 2026
20	Haleys Group Middle East	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	15 contacts →
	Partial evidence “HALEYS Group Middle East established in 2013 to meet the increasing need for top-tier engineering support services in the Energy industry.” Source: RevenueBase Database · checked Sep 17, 2026
21	Enertec Services	Indirect evidence	Doha, QatarHQ checked Sep 17, 2026	201-500	15 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
22	Servegas	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	11-50	7 contacts →
	Partial evidence “ServeGas is a Qatar-based engineering services company delivering high-performance solutions across the oil & gas, energy, petrochemical, marine, utilities, and manufacturing…” Source: RevenueBase Database · checked Sep 17, 2026
23	Ifluids Engineering And Consultancy WLL	Partial evidence	Doha, QatarHQ checked Sep 17, 2026	51-200	5 contacts →
	Partial evidence “iFluids Engineering and Consultancy WLL, Qatar Multi-Discipline Engineering Design and Technical Services - FEED - Concept & Feasibility - Basic & Detailed Engineering Third Party…” Source: RevenueBase Database · checked Sep 17, 2026
24	Gulf East Contracting & Trading CO	Indirect evidence	Al Khor, QatarHQ checked Sep 17, 2026	51-200	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
25	Limitless Engineering LLC	Indirect evidence	Doha, QatarHQ checked Sep 17, 2026	1-10	1 contacts →
	Indirect evidence “We are group of experienced engineers, consultants and advisors with over 20 years of extensive and hands-on experience in sophisticated and mega projects.” Source: RevenueBase Database · checked Sep 17, 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: refinery engineering 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 refinery engineering firms.
Partial evidence: Its own public description names part of refinery engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name refinery engineering 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 69 refinery engineering firms based in Qatar

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 409 reachable decision-makers.

Free signup · no credit card

View the full list →

Refinery engineering firms based in Qatar at a glance

As of Sep 17, 2026

9.2%Verified-email coverage

64.7Average contacts per company

51-200Median size (employees)

58.0%Largest-city concentration · Doha

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured worldwide rather than for Qatar, so it is reported there. Company counts and contact totals on this page are exact for Qatar, over 69 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 refinery 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 Qatar whose own description of what they do matches “refinery 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 refinery 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 refinery engineering firms, and records with no verified work email. Companies headquartered outside Qatar 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, 409 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 17, 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.

Refinery engineering firms by metro

Refinery engineering firms in Doha40

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 refinery 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 refinery engineering firms are there based in Qatar?

RevenueBase identified 69 refinery engineering firms headquartered in Qatar 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?

Medgulf Construction Co. WLL, headquartered in Qatar, tops this list with the largest team on record.

Which city has the most refinery engineering firms?

Doha leads with 40 headquartered companies, followed by Doha Qatar (5) and Al Rayyan (3).

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 409 verified decision-maker contacts tracked across these 69 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 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 69 refinery engineering firms based in Qatar. Start with a free account, no credit card.

Download this list →

Related lists

Refinery engineering firms by geography

Browse the directory

Browse: Companies home · All Qatar lists · All Refinery engineering firms lists · New lists

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.