DSI Middle East W.L.L., formerly QACS, is a leading Post-Tension Structural Engineering company in Qatar, established in 2005. It has completed over 100 projects, including towers, bridges, metro projects, and infrastructure.

In 2016, it became a joint venture with DYWIDAG Systems International (DSI), a global leader in civil engineering, delivering innovative and high-quality structural solutions.

Anion is a building and engineering contractor specialized in the design and construction of electro-mechanical systems.

Since its inception in 1992, Anion has been a trusted partner on the completion of successful projects around the globe. Today, Anion has embarked on the design, installation and maintenance of advanced mechanical systems for a great variety of industrial and commercial clients.

Sigma Technologies, a subsidiary of Sigma Construction Company, specializes in smart building solutions, automation, and AI-driven project management to enhance efficiency and safety in construction.

Focusing on digital transformation and sustainability, the company integrates cutting-edge technologies like IoT and AI to optimize workflows and modernize infrastructure across Qatar and beyond.