CLZ references are the large-scale investment and construction projects that its founder took part in his professional engineering and management career over twenty years. Some of such large-scale concession and construction projects are;
- 3rd Bosphorus Bridge and Northern Marmara Motorway Project, İstanbul (Investment Cost: 3,5 billion USD)
- Western High-Speed Diameter (WHSD) Project, St. Petersburg / Russian Federation (EPC Contract Value: 2,2 billion Euro)
- Ankara-İstanbul High-Speed Railway Project (Contract Value: 1,3 billion USD)
- Antalya Airport II. International Terminal and Renovation of Antalya Airport Projects (Investment Cost: 250 million USD)
- Hydro Electric Power Plants (HEPP) in Turkey (Total Investment Cost: 600 million USD)
- Bağıştaş Dam and HEPP, 140 MW, Erzincan
- Niksar HEPP, 40 MW, Tokat
- Damlapınar HEPP, 16 MW, Karaman
- Kepezkaya HEPP, 28 MW, Karaman
- Kumköy HEPP, 17 MW, Samsun
- Üçhanlar HEPP, 11 MW, Trabzon
- Üçharmanlar HEPP, 16 MW, Trabzon
- Kemerçayır HEPP, 15 MW, Trabzon
- Çileklitepe HEPP, 23 MW, Giresun