The TCG has established a consultative body on international and European relations entitled "Permanent Committee on International and European Relations (PCIER)".

The PCIER consists of colleagues experienced in international issues. They are the following:

- Ioakeimidis Stefanos, Civil Engineer, Head of the Committee

- Athanasakis Loukas, Mining and Metallurgical Engineer

- Chrisikopoulou Nantia, Civil Engineer

- Chronis Dimitris, Electrical Engineer

- Dalaklis Georgios, Civil Engineer

- Despotopoulos Panayiotis, Architect

- Fintikakis Nikos, Architect

- Kaimakis Odisseas, Electrical Engineer

- Kannas Dionyssis , Architect

- Kontopoulos Savvas, Civil Engineer

- Kremalis Kostantinos, Chemical Engineer

- Kyriakou Vaggelis, Electrical Engineer

- Oikonomopoulos Vasileios, Civil Engineer

- Sakellios Dimitrios, Naval and Mechanical Engineer

- Siola Elissavet, Architect

- Stathakis Lazaros, Chemical Engineer

- Stratigeas Nikos, Civil Engineer

- Tsatsanifos Christos , Civil Engineer

- Valis Nikos, Mechanical Engineer

- Varvitsiotis Periklis, Chemical Engineer

The TCG Executive Committee and the TCG Permanent Committee on International and European Relations are supported in administrative matters, by the personnel of the International Relations Department and the Department of European Issues of the TCG.