The following entities and firms have been involved in at least one of the projects depicted in this website as designers, clients, collaborators, PMOs, etc. Our relatioships or contractual agreements with each one depends on the specific project.

Architecture firms:

- GCE GmbH ( Germany)
- Obermeyer Hochbau & Architektur (Qatar)
- GCE Gharnata Consultant Engineers (Qatar)
- AEB (Qatar)
- Bridge consultants.(Qatar)
- Farrow Associates(Canada)
- PLP STUDIO (United Kingdon)
- UN Studio (Netherlands)
- ARCADIS. Hyder (USA)
- Ellerbe Becket(USA)
- InAr – Ingegneria Architettura.(Italy)
- Trianera de arquitectura SLP.(Spain)
- Liabesur arquitectos slp.(Spain)
- Ariem arquitectura y producciones sl (Spain)
- Samoo (Korea)

End users / Developers:

State of Qatar: Qatar Railways, Hamad Port Authority, Qatar Foundation,
SIDRA Medical Corporation, Emiri Guard.

Kingdom of Spain: Ministry of Interior. Ministry of Public Infrastructures.
Regional Government. Junta de Andalucía: SAS, ISE, EGMASA, EPSA, AGESA. Cartuja 93

Project Management / PMO
Supervision Consultants : Aecom, Hill International, GHD, KEO International
Consultants, PEO ( Private Engineering Offi ce), Dar Al Handasah.

Main Contractors:
QDCV, Midmac, OHL, Contraco, QACC, CDC Construction Development
Company, Rizzani de Eccher, Al Ali Engineering Co.WLL Construcciones
VERA, Cartuja I. ( Grupo San Jose).