Consulting Companies
- ADT Omega
- Denco Transport Engineers Ltd
- Dromos Consulting LTD
- H Fox Associates
- Halcrow Group Limited
- Invision Consulting
- Jacobs Consultants
- Lever S.A.
- Louis Berger Consultants
- Nama Consulting Engineers and Planners S.A.
- Obermeyer Hellas Ltd
- Planet S.A.
- Rebel Group
- Salfo and Associates S.A.
- Systema Transport Planning & Engineering Consultants
- Tredit SA Transport Consultants
- WS Atkins (Greece)
Public Sector
- Attiko Metro SA
- Egnatia Odos SA
- Ministry of Infrastructure and Transport
- Municipality of Athens
- Municipality of Igoumenitsa
- Municipality of Ioannina
- Municipality of Kifissia
- Municipality of Korydallos
- Municipality of Larissa
- Municipality of Metamorfosi
- Municipality of Naoussa
- Municipality of Nea Ionia
- Municipality of Neo Heraklio
- Municipality of Peristeri
- Municipality of Preveza
- Municipality of Eretria
Construction Companies – Highway Concessionaires
- Aegean Motorway S.A.
- Aktor S.A.
- Aktor Concessions S.A.
- Athens International Airport S.A.
- Attikes Diadromes S.A.
- Attiki Odos S.A.
- Kentriki Odos S.A.
- Moreas S.A.
- Mytilineos
- Nea Odos S.A.
- Olympia Odos S.A.
- TERNA S.A.
- VINCI PLC
Private Companies
- ARIONA S.A.
- LIDL
- NOVAL PROPERTY
- REMACO S.A.
- IAPETOS Development & Technology Consultants S.A.
- STEELMET S.A.
- MC ARTHUR GLEN
- CORAL S.A.
