Executive Leadership

Boart Longyear has developed an executive leadership team by bringing together professionals at the top of their fields in the industry. This group will lead Boart Longyear to future growth and development.

Jeffrey Olsen

Mr. Olsen was appointed President and Chief Executive Officer on March 1, 2016 after serving as Chief Financial Officer since 2014. Before joining Boart Longyear, he served as Chief Commercial Officer for Rio Tinto’s Iron & Titanium business since 2010. Prior to that time, he was Chief Financial Officer for Rio Tinto’s Borax and Minerals divisions for approximately eight years, and held other financial roles at Rio Tinto for another six years earlier in his career. Mr. Olsen’s experience also includes financial roles at General Chemical Corporation and Xerox Corporation in the United States.

Mr. Olsen holds a Bachelor’s of Arts from the University of Utah and a Masters of Business from the Simon School of Business at the University of Rochester. 

Miguel Desdin

Mr. Desdin joined Boart Longyear as Chief Financial Officer on January 7, 2019. Mr. Desdin’s career has led him through several key executive and financial roles within the industrial chemicals and related industries. Prior to working at Boart Longyear, he worked at TPC Group, where he served as CFO and Senior Vice President, and during the latter part of 2015 as interim CEO. He has also previously held positions within Furmanite Corporation, Celanese Corporation, Great Lakes Chemical Corporation, and AlliedSignal, Inc.

Mr. Desdin earned his MBA in Finance from the Wharton School at the University of Pennsylvania, and a Bachelor of Science in Industrial and Systems Engineering from the University of Florida.

Denis Despres

Mr. Despres was appointed the Company’s Chief Operating Officer in September 2016. He began his career with Boart Longyear in 1981 and held various positions with progressive responsibility in the Company’s drilling services and products divisions over the next 26 years, including as Senior VP, Drilling Services. After leaving Boart Longyear in 2007, Mr. Despres founded his own drilling business, which was acquired by Major Drilling in 2010. He most recently served as Major’s Chief Operating Officer prior to rejoining Boart Longyear.

Mr. Despres studied in Ontario, Canada, and received a diploma in mechanical engineering technology from Algonquin College, a Bachelor of Engineering from Lakehead University and a Master of Business Administration from Queen’s University, all of which are in Ontario, Canada.

Pat Nill

Mr. Nill was appointed to the Executive Committee in June 2021. Pat joined the company as the Vice President of Global Products in January 2018. His career has led him through several key executive roles within mining products organizations. Prior to BLY, he worked at Dyno Nobel Inc. where he held several positions including VP New Product Management and Development, Global General Manager, Electronics, and General Manager of the Eastern Region. He has also previously held positions with DetNet International as Vice President of Sales and Marketing and The Ensign-Bickford Company as Director, Commercial Sales. Pat earned his Bachelor of Science degree in Business Administration from Rockhurst University.

Kari Plaster

Kari Plaster joined Boart Longyear as Chief Human Resources Officer on October 30, 2017. Before joining the Company, Mrs. Plaster was the founder and CEO of Kindling Potential, a business coaching and consulting firm focusing on goal achievement and accountability. Prior to that, she spent several years with Rio Tinto in Senior Human Resources Management roles including Vice President, Human Resources, External Relations and Communications for the Iron Ore Company of Canada.

Mrs. Plaster holds a Bachelor of Science Degree from Boise State University in Criminal Justice Administration.

Mike Ravella

Mr. Ravella was appointed to the Executive Committee in June 2021 and is the Vice President Geological Data Services (GDS).  Mike began his career with BLY in March 2008 and held various positions with progressive responsibility in the company including Director of GDS, North American Regional Manager Aftermarket, Drilling Services Western Australia Base Metals Zone Manager, and E&I Northeast US Zone Manager.  Prior to Boart Longyear, Mike was a contaminant hydrogeologist for ten years where he ran large dynamic site investigation drilling programs with real-time data. 

Mike earned his Master of Arts degree in Earth Sciences from Boston University and his Bachelor of Science degree in Geology from Keene State College.

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