Francois Retief is the current Sustainability Committee Chair of the ASHRAE South Africa chapter and the founder of Sow & Reap, a green building consultancy. He has extensive experience in the green building industry. A Mechanical Engineer by training, Francois has worked as a building services design engineer both in South Africa and the United Kingdom. This work saw him focusing on resource efficient building services solutions and building energy simulations. From 2010 to early 2014, Francois was a part of the team at the Green Building Council of South Africa (GBCSA), developing and operating of a number of Green Building Rating Tools and Guidelines. Francois is also a Green Star SA Accredited Professional, GBCSA Faculty Member and Assessor.