# Kolin Construction **Kolin Construction** (*Kolin İnşaat Turizm Sanayi ve Ticaret A.Ş.*) is one of Turkey’s major construction and industrial companies. Founded in **1977** and headquartered in **Ankara, Turkey**, the company serves as a flagship business of **Koloğlu Holding**. ## Business Activities Kolin Construction operates primarily in large-scale construction, infrastructure, and engineering projects. Its areas of expertise include: * Highways and road infrastructure * Bridges and viaducts * Tunnels * Railways and metro systems * Airports * Ports and marine infrastructure * Dams and hydroelectric power plants * Energy infrastructure * Industrial and mining projects The company has participated in numerous major infrastructure developments in Turkey and abroad and has regularly appeared in international contractor rankings published by **Engineering News-Record (ENR)**. ## Major Projects Kolin Construction has been involved in several large-scale and strategically important projects. One of its most notable developments is its participation in the construction of **Istanbul Airport**, one of the largest aviation infrastructure projects in the world. Beyond transportation infrastructure, the company is active in projects involving power generation, water infrastructure, ports, industrial facilities, and other complex engineering works. ## Other Business Sectors Through its broader corporate group, Kolin is also involved in several industries outside traditional construction, including: * Energy and power generation * Mining * Port operations * Shipyards and maritime services * Tourism * Trade and commercial activities ## International Presence Kolin Construction maintains an international presence and has undertaken projects across **Europe, Asia, the Middle East, and Africa**. Its international operations have included countries such as: * Azerbaijan * Libya * Uganda * Poland * Romania * Oman * Saudi Arabia * Kuwait The company has established representative offices and project operations in several of these markets to support its international engineering and construction activities. ## Company Scale Kolin Construction is considered one of the prominent Turkish contractors operating internationally. Its annual turnover has been reported in the range of approximately **USD 1.5–2 billion**, reflecting the scale of its infrastructure, energy, and industrial projects. ## Summary With several decades of experience, Kolin Construction has developed capabilities in managing complex, large-scale infrastructure and engineering projects. Its portfolio covers transportation, energy, industrial construction, and public infrastructure, with operations extending from Turkey to multiple international markets.