Helen Coster is a Senior Editor at Reuters, where she writes and edits stories about business, technology and international affairs.

Her freelance work has appeared in the New York Times, the New Yorker online, the Washington Post, the Atlantic, Foreign Policy and other publications.

Prior to Reuters, she worked as a Senior Writer at Forbes. She has profiled companies and entrepreneurs in China, Argentina, Pakistan, Mexico, India and South Africa. Her profile of Mexican billionaire Carlos Slim Helu attracted worldwide media attention, and she has discussed her work on news outlets such as NPR and CNBC.

In 2010 Coster won an International Reporting Project Fellowship and traveled to Bolivia to report on foreign policy, child labor and public health.

Coster began her journalism career at ABC News, first in Peter Jennings' documentary unit and then with Barbara Walters at 20/20. At ABC, she covered topics such as Saudi-American relations and the historical search for Jesus Christ. She participated in the network's Emmy award-winning September 11th coverage, and was part of a team of journalists who won the Alfred I. duPont-Columbia Award for excellence in broadcast journalism.

Outside of Reuters, Coster serves as a Mentor-Editor at The Op-Ed Project, which seeks to expand the number of voices in media and public debate, with an immediate goal of increasing the number of women in thought leadership positions. She's also a freelance editor for select book projects, and worked on three New York Times-bestselling nonfiction books. 

She graduated from Princeton University with a BA in English.