Our People

Change Assembly is comprised of thinkers and doers who help organisations understand, and solve, complex human problems. We harness the power of data and technology, coupling it with human networks and insight, to make big things happen.

Chris van der Walt CEO, Co-founder, Hunchworks Product Manager

Chris has spent over 13 years as a user interface designer and communications strategist. He specializes in driving project development through communications strategy, partnerships and public engagement. Recent work includes branding and innovation strategy for the Global Pulse project at the United Nations.

Sara Farmer CTO and Co-founder

Sara has spent over 20 years as a lead engineer, innovations strategist and manager, developing new technologies and business cultures, and turning theory into reliable practice. Her specialist areas include business analysis, intelligent systems, systems engineering, information fusion and autonomy. Her recent work includes humanitarian big data, crisis data technologies, intelligent transport systems and unmanned vehicles.


P.J Onori Hunchworks User Experience Design

P.J. has worked as both a designer and developer for the past seven years, most notably with Adaptive Path, Method and Current TV. He has done work for organizations such as the United Nations, Samsung, Adobe and TED.com. He believes in the importance of advocating for solutions that are open, honest, fair and designed/built with the public’s best interest in mind.


Helena Puig Larrauri

Helena is a peacebuilding practitioner with experience using technology to prevent conflicts. She served as a peacebuilding specialist and analyst at UNDP Sudan until 2012, working with communities to identify conflict perceptions and build local capacities for peace. In 2010 she co-founded the Standby Task Force, an online volunteer technical community for crisis response. Prior to 2007, Helena worked as a project manager for the Mayor of London and as a risk manager for Standard Chartered Bank. She blogs on peacebuilding and technology at http://letthemtalk.org