Simplex Infrastructures Ltd., established in 1924, is one of India’s leading infrastructure solution providers, headquartered in Kolkata, West Bengal. With a workforce of 501–1,000 employees, the company offers end-to-end services in construction and engineering. Its headquarters, located at 26 Shakespeare Sarani in Kolkata, serves as the center of operations for projects spanning civil engineering, transportation, energy, marine construction, mining, urban infrastructure, and real estate development. Simplex is recognized for its ability to deliver complex infrastructure projects with a strong emphasis on quality, cost control, safety, and client satisfaction.

Over the decades, Simplex has successfully executed a diverse portfolio of projects including roads and bridges, commercial buildings, industrial facilities, residential complexes, and heritage conservation initiatives. The company integrates modern technologies with proven engineering practices to achieve sustainable and efficient solutions. Known for its reliability and on-time delivery, Simplex also focuses on staff development, community engagement, and regulatory compliance, ensuring its operations create a positive impact beyond construction. With nearly a century of experience, Simplex Infrastructures Ltd. has established itself as a trusted partner for governments and private clients in India and abroad.