In October 2025, D2 joined TSA Riley, an independent global advisor on projects and asset portfolios with a 135-year heritage. This partnership builds on the same trusted people and culture that have underpinned D2’s success – now strengthened by access to significantly broader infrastructure experience, deeper technical capability, and a truly global platform.
Together, we bring enhanced scale and reach, with 1,100 project consultants across 29 offices worldwide. This expanded capability enables us to support increasingly complex infrastructure programmes while maintaining the agility, client focus, and delivery mindset that define our team.
We continue to strengthen our reputation for:
We continue to define and pioneer new ways of helping our clients drive greater value and impact from their built assets.
Plan . Deliver . Optimise.
We call this Project Consulting.
