MESA - East Africa
Your Turnkey Water Management and Environmental Specialists (Equipment and Services)


MESA-EA have established a network of world-renowned specialists to complement their service and product offerings, and these include:

A.    Technical

1.      Jan van Hooydonck – Artois Consulting, Groundwater Specialist (Modelling).

Jan Van Hooydonck is a Consulting Hydrogeologist (M.Sc.) and Chartered Geologist (C.Geol.) with almost 30 years’ experience, mainly in the mining industry. He specializes mainly in conceptual and numerical water flow and transport models for the mineral extraction industry.  Jan participates during all the stages of a project’s development, whether this involves early feasibility studies, the optimization of operational phases or during mine closure. Find out more about Jan and Artois at


2.      Dr Peter Illgner - Permitting and Wetland Specialist.

Peter Illgner is an environmental specialist with more than 25 years’ experience in water and wetland management, and environmental permitting.  He has spent almost 10 years working in Tanzania and is very familiar with local legislation and social challenges. Contact Peter at for more details.


3.      Marius Coetzee – Tailings Storage Facility, Operations and Management.

Marius Coetzee has 18 years’ experience and is qualified in all methodologies related to tailings construction and operation. Marius has had several years’ experience in Tanzania supporting two of the Barrick operations - North Mara and Buzwagi. His services include assisting with construction, operations, managerial support, and emergency action plans. GSA Pty Ltd is owner managed with Marius Coetzee completing the role as Managing Director (MD) overseeing the daily management of the Company. GSA Pty Ltd prides themselves in the fact that 95% of their staff assisted with the implementation of the GISTM and ICMM standards on the Barrick operations. Contact Marius at for more details.


B.     Equipment

MESA-EA is an authorized reseller and support service for Van Walt, Scientific Monitoring and Sampling Equipment in Tanzania.

·        Data Collection Telemetry.

·        Groundwater Sampling.

·        Water Level & Flow.

·        Sediment & Soil Sampling.

·        Soil Moisture Testing.

·        Soil Testing & Other.

·        Water Quality.

Please contact us for product sales, advice, support, or rentals of any equipment categories mentioned above. For further details, please contact us at or refer to

Please stop by again. Thank you for your interest!