As an investment partner at Omidyar Network, Martin brings extensive experience advocating for change in government and donor policies and driving sector-level change in the field of government transparency and accountability. Based in London, Martin leads policy, advocacy strategy, and related investments for the global Governance & Citizen Engagement initiative.

Martin joined Omidyar Network in early 2012. Most recently, he was founding director of the Transparency and Accountability Initiative, a collaborative of leading funders committed to strengthening democracy by empowering citizens to hold their governing institutions to account. At Transparency and Accountability Initiative, he also helped found the Open Government Partnership, a multilateral initiative aimed at securing commitments from governments to promote transparency, increase civic participation, and harness new technologies for more effective governance. Previously, Martin founded the aid transparency campaign Publish What You Fund, helped launch Integrity Watch Afghanistan, and was a founding staff member at Tiri.

Martin began his career in open government in 2001 working for the Open Society Institute in Budapest, where he led research on the impact of anti-corruption assistance in Southeast Europe. He has published papers and articles for the Journal of Democracy, Central European University Press, and Public Administration and Development, among others.

Martin is a steering committee member of the Transparency and Accountability Initiative, as well as a board member of Open Data Institute. He holds a BA from the University of Oxford and an MSc from the London School of Economics.