The RP Geoscience Blog – About Mike O’Brien

Mike O’Brien, Director and Principal Consultant, Red Pennant Geoscience

Go to the Red Pennant Geoscience Blog

Mike is an independent Geoscience professional with decades of experience in 3D Geological Modelling, Mineral Resource Estimation and problem-solving, and the author of the Red Pennant Geoscience Blog.


For 38 years Mike 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 my 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, DRC, Russia, Kazakhstan, Uzbekistan, Colombia, Peru and the United States.

Specialties: Mineral Resource estimation, geostatistics, Mineral Resource classification, Mineral Resource reporting codes, SAMREC, JORC.

Mobile (604)652 3781
Skype mike.mob

Professional record

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 Mining & Minerals
Chief Geologist
Jun 2011 – Oct 2013

AngloGold Ashanti
Manager: Mineral Resources & Mine Geology
Nov 1998 – Jun 2011