Tehtena Mebratu-Tsegaye is a senior legal researcher for the Columbia Center on Sustainable Investment. Her work with the Center focuses on sustainable investment in extractive industries, and land and agriculture. Prior to joining CCSI, she worked with Namati as a legal consultant on cases relating to large scale mining and agricultural projects. As an Aryeh Neier fellow with the Open Society Justice Initiative she worked on anti-corruption research and litigation, and freedom of information projects. She trained as a lawyer at an international law firm where she worked on finance, energy, and infrastructure projects from the firm's London and Singapore offices. She received her law degree from the University of Oxford and her Master of Laws from Columbia Law School. She is admitted to practice law in England and Wales, and New York.