EPTA is registered under the official record of the Greek Ministry of Infrastructure, Transport and Networks(No. 588) for the design of public works.
It is also member in the following organisations:
- Technical Chamber of Greece
- Hellenic Solid Waste Management Association (HSWMA – National Member of ISWA) with a representation in the managing board
- Greek Association of Environmental Protection Companies (PASEPPE – national Member of FEAD) with ex-representation in the managing board
- Commercial and Industrial Chamber of Athens