James O\u2019Callaghan<\/strong>, the co-founder of Eckersley O\u2019Callaghan<\/em>, is widely regarded as a leading pioneer in structural glass. \u00a0More recently, he has been crucial in designing the world\u2019s tallest hybrid timber building: the Atlassian Tower in Sydney.<\/p>\n Ahead of his keynote at the Nordic Facade Forum 2025<\/a><\/em> in Helsinki, I had the pleasure of sitting down with James to explore the ideas that continue to reshape the built environment.<\/p>\n James\u2019s journey as a structural engineer has been anything but conventional. While trained, he quickly developed a deep appreciation for architecture and innovative use of materials, particularly structural glass.<\/p>\n \u201cTransparent structures highlight bad details quite well,\u201d James noted with a smile. His attention to detailing has become part of the DNA of Eckersley O\u2019Callaghan\u2019s culture. Good detailing makes architecture. And that curiosity about detail, rigor, and materials underpins the company\u2019s practice and his professorship at the Technical University of Delft.<\/p>\n James\u2019s fascination with materials has evolved beyond glass. Today, he is deeply engaged in the movement toward sustainable construction. This involves examining buildings holistically and utilizing efficient structural solutions alongside environmentally friendly materials.<\/p>\n For James, meaningful architectural innovation doesn\u2019t begin with the designer; it starts with the client.<\/p>\n \u201cAmbitious architecture comes from brave clients,\u201d he emphasized. \u201cIf the leadership isn\u2019t there, it doesn\u2019t happen.\u201d The world is full of buildings where the client had a different agenda, and the result is often mediocrity.<\/p>\n James believes that informed, visionary clients are essential partners in pushing boundaries. This alignment enabled the bold ambitions behind Apple\u2019s trailblazing buildings and the Atlassian Tower project, which aims to reduce embodied carbon by 50% compared to traditional construction.<\/p>\n Material efficiency isn\u2019t just about selecting the right elements for buildings. It\u2019s about revisiting the very design assumptions we take for granted.<\/p>\n \u201cColumns are structurally efficient. Beams and floors are not,\u201d James explained. \u201cThe more frequently we support beams and floors, the more efficient the building becomes.\u201d<\/p>\n While architects often push for open, column-free spaces, sustainability demands that we rethink such preferences. \u201cIf the lens is about making space at all costs, we can do that. But the cost is our environment.\u201d<\/p>\n The future of skyscrapers, according to James, lies in compromise and collaboration, rethinking layout, orientation, and structure for maximum environmental performance. \u201cWe need to celebrate these challenges, not feel tortured by them,\u201d he said.<\/p>\n The Atlassian Tower in Sydney is the most vivid embodiment of these ideas. Rising to 200 meters, it will be the world\u2019s highest hybrid timber building. It combines a concrete core, a steel exoskeleton, and interspersed timber floors.<\/p>\n James said the project was only possible due to early collaboration and a visionary client. \u201cIf we had come in after the architectural competition, we couldn\u2019t have achieved the same goals,\u201d he noted. From procurement choices, such as sourcing steel from low-carbon regions, to navigating fire codes and construction logistics, every decision had to be made with sustainability in mind.<\/p>\n Building projects that challenge the vernacular in any particular location are always challenging to those that take them on, but with the right leadership the team has succeeded. James points out that early risk mitigation is key to building efficiently and delivering a pioneering building.<\/p>\n Given James\u2019s legacy in structural glass, I couldn\u2019t resist asking about its future in an age of tightening energy codes. While glass is theoretically 100% recyclable, the reality in buildings is far from circular. Only 5\u201310% of architectural glass is recycled, most ending up in landfills.<\/p>\n But hope is on the horizon. James and his peers are exploring reuse systems and casting waste glass into new architectural elements. Meanwhile, facade performance expectations are rising faster than glass technology can keep up.<\/p>\n \u201cThere\u2019s pressure to use less glass, but we can\u2019t live without it,\u201d he argued. \u201cGlass connects us to the outside and brings in light. It now needs to be used more creatively and supported by better technologies.\u201d<\/p>\n Digital design has fundamentally changed how Eckersley O\u2019Callaghan approaches projects. Engineering has transformed from an iterative process to a parametric and parallel process. Hundreds of design scenarios can be explored in minutes with a powerful model.<\/p>\n But James remains cautious. Computational tools are incredible, but we must also retain the instinct to know if something is right.<\/p>\n AI and sensor data will play a more significant role in engineering. Structural feedback loops could, for example, reveal overdesign in structures, potentially leading to considerable material savings.<\/p>\n At the Nordic Facade Forum 2025<\/em>, James will share his insights on the evolution of facade technology and its future.<\/p>\n From material trends to environmental imperatives, his talk will offer a unique perspective on where facade design is headed and what that means for designers, engineers, and developers alike.<\/p>\n You can connect with James on LinkedIn<\/a> and learn more about Eckersley O\u2019Callaghan\u00a0by visiting eocengineers.com<\/a>.<\/p>\n Visit gii.fi<\/a> to view the full program and register for the June 9, 2025, event.<\/em><\/p>\n The title image: Steve Jobs Theatre, Cupertino, CA \/ \u00a9Eckersley O\u2019Callaghan \u2013Architect: Foster + Partners<\/a><\/p>\n<\/div>\nA Career Built on Curiosity<\/h2>\n
![\"James](\"https:\/\/aec-business.com\/wp-content\/uploads\/2025\/04\/james-ocallaghan.jpg\")
Brave Clients Make Bold Buildings<\/h2>\n
![\"Apple](\"https:\/\/aec-business.com\/wp-content\/uploads\/2025\/04\/apple-hq.jpg\")
Rethinking High-Rise Efficiency<\/h2>\n
Lessons from Atlassian Tower<\/h2>\n
![\"-\"](\"https:\/\/aec-business.com\/wp-content\/uploads\/2025\/04\/Atlassian-tower.jpg\")
Can Glass Be Sustainable?<\/h2>\n
Digital Design and the Road Ahead<\/h2>\n
![\"Beijing](\"https:\/\/aec-business.com\/wp-content\/uploads\/2025\/04\/beijing-city-library.jpg\")
Coming to Helsinki<\/h2>\n
\n