Jeffery Tygesen

Chief Executive Officer
Jeff Tygesen was appointed Chief Executive Officer of Turquoise Hill Resources on December 1, 2014. He has been a Turquoise Hill director since August, 2012. Previously Mr. Tygesen spent more than 30 years with Rio Tinto in operational roles across multiple product groups as well as technology and innovation and strategic planning. Most recently, he was Vice-President, Copper Development at Rio Tinto Copper Group and was responsible for overseeing Rio Tinto's joint venture interests at its Chilean and Indonesian copper operations. Mr. Tygesen's previous positions included Mining Executive, Rio Tinto Copper Group; Regional General Manager, Rio Tinto Technology and Innovation; Manager, Long Term and Strategic Planning, Rio Tinto Energy America Coal; and Manager of Mine Development, Diavik Diamond Mines.

Mr. Tygesen holds a Bachelor of Science degree (Mining Engineering) and a Master of Science degree (Mining Engineering), both from the University of Utah. He is a member of the Society of Mining Engineering and the Institute of Corporate Directors.


Steeve Thibeault

Chief Financial Officer
Steeve Thibeault was appointed Chief Financial Officer of Turquoise Hill Resources on June 1, 2014 bringing more than 30 years of extensive financial and corporate experience to the Company. From August 2009 to May 2014, Mr. Thibeault was Chief Financial Officer of ASX-listed Energy Resources of Australia. Prior to that role, he held various mining and manufacturing roles with Rio Tinto Alcan and Alcan Aluminium Limited.

Brendan Lane

Vice President, Operations and Development
Brendan Lane was appointed Vice President, Operations and Development of Turquoise Hill Resources on February 1, 2016 bringing more than 25 years of mining industry experience to the Company. Since 2013, Mr. Lane has served as Minera Escondida Limitada and Grasberg Finance Director at Rio Tinto Copper. In this capacity, he provided strategic guidance and decision support to operational management teams with joint venture partners BHP Billiton and Freeport-McMoRan. Previously, Mr. Lane held a variety of commercial roles in the Rio Tinto copper and coal business units as well as engineering positions at Anglo American and BHP Billiton. Mr. Lane holds a Chemical Engineering degree from the University of Queensland and a Master of Applied Finance degree from the University of Southern Queensland.


Dustin S. Isaacs

General Counsel and Corporate Secretary
Dustin S. Isaacs was appointed General Counsel and Corporate Secretary of Turquoise Hill Resources on January 1, 2013. Mr. Isaacs was previously Legal Counsel with Rio Tinto where he provided strategic advice to various business units on a wide-range of legal issues and held lead roles in certain M&A, divestiture and joint venture projects. Prior to Rio Tinto, he was in private legal practice for eight years in the business law group of a major Canadian law firm.