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


Louise Hawson

Louise Hawson is a specialist sustainability consultant with more than 25 years’ experience working with clients from mid-cap companies to multi-national corporations and government agencies. As Director of Sustainable Balance, her work focuses on improving the effectiveness of sustainable sourcing programs in agricultural supply chains, through strategic risk assessment, supplier engagement, and intelligent approaches to GHG and ESG reporting requirements. She is also an expert assurance advisor, with particular interest in how audits can support continuous improvement. She has developed protocols, guidance and rating systems for supplier audit programmes, including company-owned and third-party standards. She is currently technical advisor to Sustainable Agriculture Initiative’s Third-Party Verification and Audit programme.

Daisy Johnson

Daisy Johnson is a business and human rights professional with 10+ years’ experience in delivering strategy to address complex human rights issues. She has supported FTSE100 companies on policy development, social impact assessment, due diligence aligned with the UN Guiding Principles for Business and Human Rights, stakeholder engagement and reporting. Most recently Daisy has been focused on human rights in the ICT and digital sector, actively participating in the Global Network Initiative and supporting Vodafone Group as Acting Senior Human Rights Manager.

Asri Putri

Asri Putri is an Indonesian consultant with more than 11 years of professional experience in different organizations. She graduated cum laude Master of Marketing Communication from the University of Indonesia. She began her career in the communication field and progressed to work for the sustainability and communication department at Sinarmas Asia Pulp and Paper, one of the biggest pulp and paper companies worldwide. Asri is now an independent sustainability and communication consultant. Since 2018, she has provided consultancy for the Anambas Foundation and acts as Program Manager. In 2019, she founded a social enterprise called Echosystem Indonesia.

Grace Cheah

Grace Cheah is a Singapore-based associate of Challenge Sustainability, providing sustainability related consulting services. She has 12 years of experience in consultancy and auditing for various management system and social compliance standards. Grace previously worked for DNVGL in their Singapore office, responsible for sustainability assurance work with clients including Globe Telecoms, Manilla Water, and Keppel Corporation. Grace has an Advanced Certificate in Training and Assessment (ACTA) and has delivered public training for organisations such as Singapore Stock Exchange, Singapore Green Building Council and Singapore Management University. Her previous experience includes report writing and external assurance on sustainability reports and integrated reports for various companies including CH Offshore, Memories Group, Yoma Strategic Holdings, and Sembcorp Marine.

Lucy Connell

Lucy Connell has over 20 years’ experience in the global telecommunications and sustainable business sector. She now works as an independent consultant with a specific focus on sustainability and environmental reporting and disclosure. Lucy was Group Environment Manager at Vodafone where she was responsible for developing Vodafone's environmental and climate strategy and emissions targets across the worldwide operating companies in the Group. Prior to that Lucy was in the sustainability team at Nokia for 10 years where she held various environmental management roles addressing design for environment, supply chain and recycling.

Jerry Marcelinus Winata

Our representative in Indonesia and South East Asia. Jerry is a passionate professional possessing strong network of opinion makers and industry leaders with over ten years' experience delivering high-value, high-impact communications initiatives in the public and private sector. Previously Jerry was Communications and Private Sector Engagement Officer for the United Nations World Food Programme (WFP), based in Jakarta. Before this position he was a Communications Consultant for the World Bank.