We have an established network of service providers. We are able to build bespoke teams for individual client requirements, managed and co-ordinated by Challenge Sustainability.

ESG Treasury

ESG Treasury - providing traditional treasury advice and consultancy, helping organisations to deliver sustainable finance solutions.  Our experience and partners cover both traditional treasury activities and ESG / sustainable finance.

Lengua Collective

Lengua Collective - Jakarta-based collective of seasoned linguists and professional translator, providing interpreting, translating, writing, event organising and simultaneous interpretation system rentals.

Twenty Fifty

Twenty Fifty – advisors on leadership and organisational development, stakeholder engagement and human rights


AB – creative digital design agency, experts in sustainability report design and digital communications