Mike O’Brien – Principal Consultant
Mike is an independent Geoscience professional with decades of experience in 3D Geological Modelling, Mineral Resource Estimation and problem-solving.
For 38 years he has been making a difference to Mineral Resources and mines. On the technical front, he has extensive experience in Mineral Resource estimation and geological modelling. He has managed technical teams to achieve results in mining companies and in consultancies.
While the majority of his experience has been in gold deposits, he has expertise in the uranium, base metals and multi-product environment.
A qualified geologist and geostatistician, he has been a team member and reviewer of due diligence and feasibility exercises in South Africa, Brazil, Ghana, Namibia, the DRC, Russia, Kazakhstan, Uzbekistan, Colombia, Peru and the United States.
His areas of specialization include Mineral Resource estimation, geostatistics, Mineral Resource classification, and Mineral Resource reporting codes, e.g. SAMREC, JORC.
As Director and Principal Consultant of Red Pennant Geoscience, he writes the Red Pennant Geoscience Blog.
“I aim to bring new insights and new practical applications of best-of-breed solutions to problems and enhance opportunities in a challenging era for mineral resources and mines.” – Mike O’Brien
Mobile (604) 652 3781
- Red Pennant Communications Corp.
Principal Consultant & Director – Red Pennant Geoscience
April 2019 to current
Technical Director, Geology & Resources
May 2018 – April 2019
Senior Principal Consultant
Nov 2014 – Apr 2018
Principal Technical Specialist
Oct 2013 – Nov 2014
- Tetra Tech Inc., Mining & Minerals
Jun 2011 – Oct 2013
- AngloGold Ashanti
Manager: Mineral Resources & Mine Geology
Nov 1998 – Jun 2011
Technical leader for Resource Estimation and Mine Geology, initially in South Africa, and at various times in Ghana, Australia and North & South America. Due diligence and M&A team technical member and reviewer.
- Anglo American (Ore Evaluation Department)
Divisional Ore Evaluation Analyst
Oct 1991 – 1998
- Anglo American Corp.
1990 – 1991
President Brand Gold Mining Company, Welkom
- Anglo American Corp.
Company Name Anglo American Corporation
1988 – 1990
- Vaal Reefs Exploration & Mining
1986 – 1988
Licenses & Certifications
Credential ID 41338
The South African Council for Natural Scientific Professions (SACNASP)
Issued Jul 1987
Credential ID 400295/87
Credential ID PC19112134x
1995 – 1999
B.Sc. (Hons.) Geology
1975 – 1978
“Mike O’Brien is the best Mineral Resources Geologist with the best knowledge of mineral resources reporting codes in the industry. To work for him is an opportunity to learn a lot in several fields and also about his culture.” – Alessandro Silva, Senior Manager at AngloGold Ashanti: Resource Evaluation & Mine Geology
“Mike is an incredible, down-to-earth type of Manager, who was instrumental in laying down solid foundations for me to build my career further on. He mentored me, and I have the world’s respect for the way that he interacts with people; always quick with a joke or two and then down to serious business. Mike is a real asset to the Mining industry and his accolades and achievements over the years bear testimony to this.” – Johan De Bruin, M.Eng, Pr.Sci.Nat. (SACNASP), FSAIMM, Group Technical Services/Mineral Resources Manager, Thriveni EarthMovers Pvt. Ltd.