Meet the Team

Dr Mark Graham
Specialist Aquatic Scientist
Mark has over 35 years experience in the fields of water quality and aquatic ecosystem health. He is passionate about citizen science and is based in our Hilton office.

Craig Cowden
Specialist Wetland Ecologist
Craig has more than 25 years’ experience in ecosystem functioning and management, specialising in the restoration of wetland ecosystems. He is based in our Hilton office.

Trevor Pike
Principal Engineer
With a strong focus on ecosystem rehabilitation and well as agricultural engineering, Trevor has over 30 years’ experience in his field. Trevor is based in our Hilton office.

Gary de Winnaar
Biodiversity Specialist
Gary has close to two decades of experience in the assessment of aquatic and terrestrial biodiversity – both fauna and flora. Gary is based in our Hilton office.

Dr Nonjabulo Gule
Sustainability & Climate Advisory Specialist (Cape Town)
Nonjabulo has over 15 years of experience across academia, consultancy, and public-sector advisory. She is based in our Cape Town Office.

Kylie Farrell
Aquatic Ecologist (Gauteng)
Kylie is an experienced freshwater ecologist with a strong focus on water resources, freshwater ecology and catchment management. Kylie is based in our Pretoria office.

Adie Talbot
Terrestrial Ecologist
Adie specialises in terrestrial ecology, ecosystem health and biodiversity and has several years’ experience in spill rehabilitation and monitoring. She is based in our Hilton office.

Juan Tedder
Freshwater Ecologist

Busisa Ntshangase
Freshwater Ecologist and Policy Specialist

Charlene Russell
Environmental Educator and Wetland Ecologist



Formal education
Formal education
Formal education
Formal education





















