Turkish Joint Venture for 1915 Çanakkale Bridge

DLSY operates as a Turkish joint venture that was formed to deliver the 1915 Çanakkale Bridge and its associated motorway infrastructure. The venture's core activity involves the planning, engineering, construction, and potentially the operation of large‑scale bridge and highway projects. It focuses on the domestic Turkish market, leveraging local expertise to meet national infrastructure goals. The joint venture model allows partner companies to combine specialised competencies in civil engineering, project management, and construction logistics. Through this collaboration, DLSY undertook one of the world's longest suspension bridges, a flagship project that underscores Turkey's ambition in modern transport infrastructure.

In April 2021, the joint venture experienced a ransomware attack that encrypted its servers and files, affecting the personal data of approximately 20,000 individuals. The breach impacted employees, their relatives, and subcontractor personnel, with potentially exposed data categories including identity, communication, health, financial, and legal information. Upon detecting the incident, DLSY notified Turkey's data protection authority and confirmed that investigations into the attack were ongoing. The attack involved ransom demands from the perpetrators, highlighting cybersecurity risks faced by construction and infrastructure firms. Beyond this incident, no further details about the organisation's size, ownership structure, or parent/subsidiary relationships are provided in the available sources.