Our Team Meet the awesome engineers behind Greenplan


Francois Joubert

Managing Director and Founder

Francois founded Greenplan Consultants in 2007 after realising the huge impact buildings have on energy and building material resources. He is a passionate champion for the use of building performance simulation to aid designers and developers to create better buildings. He holds an M-Eng. in Aeronautical Engineering from the University of Stellenbosch and is a registered professional engineer.


Josebus (Sewis) Van Zyl

Computational Fluid Dynamics

Sewis Van Zyl is responsible, amongst others, for general building performance modelling at Greenplan Consultants. With almost 10 years of experience in Computational Fluid Dynamics (CFD), he has a deep passion for combining the art and science of developing effective CFD solutions for complex natural ventilation and wind flow problems. Sewis holds a Ph.D. in Mechanical Engineering from the University of Stellenbosch. Prior to Greenbuild Consultants, Sewis did post-doctoral work at both the University of Stellenbosch and National Renewable Energy Laboratory in the USA.


Kenneth Allen

Thermo-Fluid Dynamics

Kenny Allen is responsible for, amongst other tasks, general building performance modelling. He enjoys the field of Thermo-Fluid Dynamics, and the related topics of power generation and renewable energy systems and technologies. He spent eight years doing research on thermal storage, with a focus on packed beds. Kenny holds an MSc(Eng) and a Ph.D. from the University of Stellenbosch and has also completed post-doctoral research at the same university.


Sven Oxtoby

Building Performance Assessment

Sven Oxtoby is the building performance assessment expert at Greenplan Consultants responsible for generating and maintaining standard procedures and reporting formats. Prior to joining Greenbuild Consultants, Sven worked as consulting engineer at WSP on heating, ventilation and air-conditioning, also specialising in thermal and daylight modelling. Sven holds a BSc in Mechanical Engineering from the University of Cape Town.


"I'm completely blown away by the standards to which you and your team are being industry leaders locally and the level of competency and professionalism to which you all work; it's quite inspiring and respectful to tell the truth and has left me motivated to raise my own game where I can. I have nothing but respect for each of you and the level of professionalism and ethics to which you hold yourselves personally and through your work."

Dennis GuichardDGA.Energy

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