Eira Thomas is a Canadian geologist whose career in the mining industry spans more than 20 years. She served as a geologist with Aber Resources Ltd. (now Harry Winston Diamond Corporation) from 1992 to 1997, leading the field exploration team that discovered the Diavik Diamond Project pipes in the Northwest Territories in 1994 and 1995. She was promoted to Vice-President Exploration for Aber in 1997, a post she held for two years, and served on the Board of Directors from 1998 to 2006. Diavik became Canada''s second diamond mine when it went into production in 2003.

Ms. Thomas is currently a director of a number of other public companies and organizations, including Suncor Energy Inc., Dundee Precious Metals Inc., Strongbow Exploration Inc., Lucara Diamond Corp., the Prospectors and Developers Association of Canada (PDAC), the University of Toronto (U of T) Alumni Association, the Lassonde Advisory Board of the U of T, and she is a member of the U of T President''s Internal Advisory Council. Previously, Ms. Thomas held the positions of President of Navigator Exploration Corporation, CEO and Director of Stornoway Ventures Limited, and President, CEO and Director of Stornoway Diamond Corporation.

In 2004, Ms. Thomas was honoured as one of "Canada''s Top 40 under 40" by the Caldwell Partners and the Report on Business Magazine. Three years later (May 2007), she was awarded The William Harvey Gross Award, bestowed annually by the Mineral Deposits Division of the Geological Association of Canada, to a geoscientist less than 40 years of age who has made a significant contribution to the field of economic geology in a Canadian context. Later that year (November 2007), Ms. Thomas was selected as one of "Top 100 Canada''s Most Powerful Women". In March 2008, she was one of only four Canadians that year to be named to the "Young Global Leaders", by the World Economic Forum. In May 2009, Ms. Thomas was a recipient of the CIM''s (Canadian Institute of Mining and Metallurgy) Past Presidents'' Memorial Medal, awarded to a member under 45 who, by his/her accomplishments, has set an outstanding example to young members of the Institute and to young men/women contemplating a career in the minerals industry. In 2010, Ms. Thomas received the Minerva for BC Women Natural Resources Award. Ms. Thomas graduated from the University of Toronto with a Bachelor of Science in Geology in 1990.