Eckersley O'Callaghan is a structural design practice founded by Brian Eckersley and James O'Callaghan in 2004.

The firm focuses on engineering and architecture, specialising in structural and facade engineering design. Completed projects include a number of commercial, education, culture and leisure, marine, residential, retail and infrastructure projects.

The company is headquartered in London, with additional offices in Paris, New York, Los Angeles, Hong Kong and Sydney. Its workforce comprises over 90 staff including structural and facade engineers.

Pictured above is the spherical glass Apple Marina Bay Sands store in Singapore, which Eckersley O'Callaghan collaborated with Foster + Partners with to create.