09 May 2024

The Professional Services Alliance (PSA), consisting of Kier, Tony Gee and RPS, A Tetra Tech Company, has been awarded ISO 44001 certification – the international standard for Collaborative Business Relationships.

Formed in 2019, the alliance was established to create an enhanced delivery model for key highways projects, using integrated design and build and early contractor involvement. Combining complementary skills and expertise, the alliance enables more effective collaboration among the three companies, which translates to increased flexibility, value creation and problem solving for clients and other stakeholders.

ISO 44001 sets out requirements for the effective identification, development and management of collaborative business relationships within or between organisations. The certification measures behaviours, organisational culture, and management processes, and recognises the best-in-class collaboration demonstrated by the PSA following an in-depth two-stage audit process undertaken by the BSI (British Standards Institution.)

The PSA is currently delivering the design for key projects across the UK for National Highways, including the A417 Missing Link, M6 Lune Gorge structures and the A66 Trans-Pennine Link.


"The Professional Services Alliance brings together the skills of three companies, providing our clients with a well-rounded, fully integrated design capability. This certification is a culmination of the focus we have invested in working collaboratively to offer the best outcome for our clients and we look forward to seeing how the alliance continues to grow."

Jordan Flint, chair of the PSA

"BSI would like to congratulate the PSA on their achievement of being successfully certified against ISO 44001 for their collaborative business relationship.

“Pursuing the certification has shown the alliance’s dedication and commitment to adopting collaboration, openness and flexibility as core values. They are to be congratulated for their focus on this in order to drive forward new ways of working, push innovation and support the objectives set out by the UK Government in The Construction Playbook for delivering excellent public works."

Simon Healey, Operations & System Certification Director UK&I