About us

Planetary Geophysics was established in 2006 by principals with over 50 years experience between them in mineral exploration geophysics.

Planetary employs a suite of Consultants, Geophysicists, Geo-scientists, Geologists and Technicians with extensive experience in Mineral, Geothermal, Oil & Gas exploration around the world.

Key areas of expertise in data acquisition, data processing and interpretation are (but not limited to):

  • 2D & 3D IP/Resistivity
  • High Powered Time Domain EM (HaiTEM)
  • Ground Magnetics
  • Gravity
  • Magnetotellurics (MT)


Planetary Geophysics has experience working in the following countries:
Australia, Argentina, Burkina Faso, Chile, D.R.Congo, Fiji, Ghana, Indonesia, Ivory Coast, Laos, Liberia, Mali, Mexico, New Zealand, PNG, Solomon Islands, Turkey, Vietnam, Malaysia, Kazakhstan, Kyrgyzstan, Madagascar, UK & Ireland, Armenia.


Our Team

Mike Sexton
Chief Geophysicist

Mike has over 30 years experience in mineral exploration and hydrological geophysics. His experience is highly regarded throughout the exploration industry. Mike has been involved with several exploration successes within Australia and offshore and has also published several peer reviewed papers within the ASEG and SEG societies.
Mike's career spans time with Anaconda, the Northern Territory Geological Society, Newmont Australia, Newcrest, Normandy Mining where he was Chief Geophysicist for a number of years and Newmont Mining Corporation which he left in late 2005 to pursue his consultancy ambitions.

Mark Winter
General Manager

Mark has worked as a geophysical technician for over 30 years in over 20 countries and is one of the foremost DC electrical operators in operation today. Mark has worked for majors and juniors alike and has been contracted as a dedicated contractor to Normandy Mining and Newmont Mining for nearly 20 of his 25 years in the field.
In June 2006 Mike Sexton and Mark joined forces to form Planetary Geophysics.

Alan Gillespie
Operations Manager & Business Development 

Over a decade with Planetary Geophysics, Alan comes from a strong business background and has extensive experience in all aspects of global operations 

Mat Davies
Project Coordinator & OHS

With operational and project management experience in 15+ countries over the last 10 years with Planetary Geophysics, Mat combines a strong IT background with Project coordination to manage jobs of all logistical difficulties worldwide

Regina Foley
Business Management / Accounting

Regina joined Planetary Geophysics at it's inception in 2006 and brings numerous business skills to the table, with years of experience as National Administration Assistant for Canon Australia, Tech.