- Technical Chamber of Greece
- Athens Chamber of Industry and Commerce
- Hellenic Association of Consulting Offices (HELLASCO - FIDIC Member)
- PHARE / TACIS (Reg. No. ELL - 21214)
- European Union/Directorate Development DG (Reg. No. A903)
- FIDIC
- HELLASTRON – Hellenic Association of Toll Road Network
- Hellenic - African Chamber (member since 2025)
- Hellenic-Ukrainian Chamber (member since 2025)
- Deutsch- Griechische Industrie (member since 2022)