The Green House consultants have 35 years of combined experience in the sustainability field, working in industry, consultancy and academia in South Africa, Australia, Denmark, the UK and the USA.

Our experience spans a variety of sectors including mining, minerals, chemicals, energy generation, bioenergy, biofuels, water, agriculture, food, consumer products, retail and building materials.

Who we are

Dr. Brett Cohen   Dr.-Philippa-Notten   Dr. Yvonne Lewis

Dr. Brett Cohen


Dr.Philippa Notten


Dr. Yvonne Lewis

BSc. Chem Eng. (UCT)

Brett is a principal consultant at The Green House, with his focus areas including climate risks and opportunities, scenario and futures planning, technology assessment, industrial ecology, decision support, facilitation and strategy development. His interests include development of decision support frameworks, tools and modelling paradigms for supporting complex decision-making in the context of sustainability, in strategic, tactical and operational decision contexts.


BSc. Chem Eng. (UCT)

Pippa is an expert LCA practitioner with over 15 years of experience, primarily relating to life cycle assessment and product carbon footprinting in the food, retail, and consumer good sectors, and in the primary industries (mining and power generation). Pippa has worked as a consultant in the USA, Denmark and South Africa contributing to a number of industry, EU- and UNEP-funded research projects in the broad areas of process technology assessment, Life Cycle Assessment (LCA) methodology development and environmental decision-making.


BSc. Chem Eng. hons. (UCT)
PhD (USyd)

Yvonne is a principal consultant at The Green House specialising in carbon footprinting, environmental management and the quantitative assessment and modelling of systems in support of strategy, scenario development and futures work. Yvonne has a keen interest in sustainability metrics and indicators and experience in ecological footprinting and carbon footprint methodology development in the urban context.

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Kyle-Mason-Jones   you?    

Kyle Mason-Jones


Work For Us


BSc. Chemistry (UNISA)
MSc Chem Eng. (UCT)

Kyle is a consultant at The Green House with experience in assessment of industrial and commercial energy efficiency and environmental performance at various scales ranging from single sites or products to sectoral analyses, and evaluation of technologies and non-technological interventions for improvement in these areas. Kyle also has expertise in resource and system modelling including Material Flow Analysis.


The Green House is seeking to recruit a consultant to join our growing team.

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Our carbon footprint

The Green House manages its carbon footprint by supporting poverty alleviating emissions reduction projects.

All offsets are purchased through the Credible Carbon Registry which is independently audited.

Click here to read more about Credible Carbon. View our certificate.