- Advanced Vision Co.
- AG Middle East L.L.C.
- Alluminum Gulf Ray
- Al Jaber & Partners
- Al Bandary Atlascat Iinternational Ltd.
- Albandary Engineering Logistic Department
- Al-Bandary Group
- Al bandary Transport
- Al Bawakir Group
- Al Darwish Engineering W.L.L
- Al Faris Heavy Equipment
- Al Farman International Trading Co. W.L.L.
- AL HUDA ENGINEERING WORKS
- Al Ibthihaj Engineering Contracting & Trading W.L.L
- AlJaber Engineering LLC
- Al Jaber Landscape Qatar W.L.L
- Al Jaber Steel Co.
- Al Kalaa Heavy Equipment
- Al Khayyat KCT
- Al Muftah Contracting
- Al Nakheel
- Al Radi
- Al Raed CO.
- Al Ryum Cont. & Trading Co.
- Al Sharaka Holding
- Al Sraiya Contracting
- Al Waha Cranes
- ALCAT Contracting Co.
- Alumco Qatar
- Alysj Joint Venture
- AMANA Qatar Contracting
- Amwaj Qatar
- Arab Diar Trad & Cont. Co. W.L.L.
- Ascon Engineering
- Alsaad General Contracting W.L.L
- Badr Contracting
- Bothar Boring & Tunnelling
- BEIN Media
- BETON Ready Mix
- Bin Omran Trading & Contracting
- Bo Jamhoor Mechanical and Electrical Company
- Boom Construction
- Care way Contracting
- Consolidated Contractors Group S.A.L (Offshore) CCC
- Commodore Cement Industries Doha LLC
- Construction Devt Contracting & Trading
- Challenger Trading & Contracting
- Charlotte Trading & Contracting
- China Railway
- Civil tech WLL
- Classical Palace
- Combined Group Company
- Contraco W.L.L
- Dara Al Watan
- Desert Diamond Contracting
- DEPA Qatar W.L.L
- Derwind Trading & Contracting Company W.L.L.
- Dutch Foundation Qatar Co.
- Doha Cladding
- Doha Group
- DOMOPAN
- Dorsch Qatar
- Dutest Qatar
- Ebnsina Medical
- Ekron Enterprise WLL
- Elite Middle East
- EMDAD Equipment Leasing Co.
- Electro Mechanical Engineering Co. W.L.L
- Erkat Middle East W.L.L.
- ETA Star MNE Division
- Ezdan Hotels
- GA Installation & Maintenance Qatar WLL
- GULF CONSOLIDATED CONTRACTORS WLL
- Ghantoot Construction & Transport Development WLL
- Generic Engineering Technologies W.L.L
- GREATER DOHA TRADING & CONTRACTING W.L.L
- Gulf Engineering Transportation & Contracting.
- Gulf GRC
- Gulf Tunneling Company.
- Harinsa Qatar
- Hassanesco
- H.K.H /General Contractors
- HLG Leighton Contracting
- Habtoor Leighton Contracting
- Hyundai
- INSHA ICT Qatar
- ITCC Steel Division
- Imperial trading & Contracting Co. W.L.L
- ISG (Impregilo -SK E&C – Galfar Al Minsad JV
- International Trading and Contracting Company
- Joannou & Paraskevaides (Overseas) Ltd
- KG Group (Al Khayarin Group)
- Khaled Projects Co.
- Khalid Cement Industries Complex
- KHETCO (Khyber Heavy Equipment & Trading Co.
- KITTCO Contracting
- Larsen & Toubro Limited
LOTUS Trading & Contracting Company
- Makka Modern Printing Press W.L.L
- MBD Contracting & Transport
- MEC (Modern Emirates Cranes & Bldng. Equipments Co. L.L.C)
- MEDCO (Middle East Dredging Company)
- MegaTec Qatar
- Memar Trading Contracting Co. Qatar
- Midmac Contracting Co. W.L.L
- MKM Real Estate Inv., Cont. & Trading
- Mowasalat
- Mughals Qatar Contracting & Trading Company W.L.L.
- NASCO
- Nael & Bin Harmal Hydroexport W.L.L
- Parsons
- Petroserv Alkhor
- PLQ (POWER LINE ENGINEERING – QATAR)
- Profession Aluminum Company
- Qatar Alpha Beton Ready-mix Co WLL
- Qatar Foundation
- Qatar Gardens
- QBC (Qatar Building Company
- QCTC – Qatar Construction Technique Company
- QD-SBG Bin Laden
- QDC – Qatari Development Co.
- QDVC Academy
- The Qatari Modern Maintenance Company (QMMC)–MEP Company
- RBC (Al Rawafea Al Borjeiah Co.)
- REDCO Construction – Almana
- REDCO Workshop
- Rocks & Aggregates
- SAK Trading and Contracting
- SAMA Equipment
- Secure Electric
- Shannon Engineering
- Shapoorji Pallonji Qatar WLL
- Shaqab Abela
- SIS (ME) LLC
- Sky Technology
- SOGELEC ISKAN FOR ELECTRICAL CONTRACTING CO.
- SOLB W.L.L
- Solid General Construction
- T.E.A for Mechanical Contracting W.L.L.
- TADMUR Contracting
- Tawrid Qatar
- Technical Cadres Contracting Company
- Terratest Qatar LLC
- The Look Company
- Trans Gulf International Electro Mechanical W.L.L.
- Tribes Construction
- Triger Contracting WLL
- Trinity Engineering
- Twin Contracting
- UCC- UrbaCon General Contracting
- UCE – United Construction Establishment
- Unique Trading Contractor
- Unitec
- United Equipment Group
- UTEB
- Voltas Limited
- Vision Trading Services
- Water Master
- WCT – Al Ali Joint Venture
- We Trade Trading & Contracting
- WEN QATAR W.L.L
- We Trade – Trading & Contracting
- ZUEBLIN INTERNATIONAL QATAR L.L.C.