| 2002 | Sewage and wastewater treatment plant rehabilitation of Constanta, Romania. Tender geotechnical pre-design (J/V PROODEFTIKI S.A. – GIOVANNI PUTIGNANO & FIGLI S.r.l.) |
| 1995 | Sewage treatment plant of the city of Serres (KORONIS S.A. – SECIT S.p.A.) |
| 1995 | Sewage treatment plant of the city of Orestiada (KORONIS S.A. – SECIT S.p.A.) |
| 1995 | Biological treatment plant of the greater area of the city of Kozani (TECHNER S.A. – SECIT S.p.A.) |
| 1994 | Sewage treatment plant of Patras (TECHNER S.A. – SECIT S.p.A.) |
| 1993 | Sewage treatment plant of the city of Kerkyra at the Alykes area (TECHNER S.A. – SECIT S.p.A.) |
| 1993 | Biological treatment plant of the sewage of the town of Xylokastro (DORIKOS S.A. – TEGEA Ltd.) |
| 1992 | Sewage treatment plant of the city of Zakynthos (TECHNER S.A. – SECIT S.p.A. – KORONIS S.A.) |
| 1992 | Sewage treatment plant of the city of Thebes (MUNICIPAL ENTERPRISE OF WATER SUPPLY AND SEWERAGE) |
| 1990 | Biological treatment plant of the city of Phodes (TECHNER S.A.) |
| 1988 | Sewage cleaning plant of the city of Ioannina (TERNA S.A. –ENERGOPOL) |
| 1981 | Sewage center in Metamorfosi, Attica (J/V DEGREMONT S.A. – DIMITRAKOPOULOS – KONSTANTINIDES) |