Simon Penso is the Director of Solid Green Performance and a seasoned sustainability professional with over 15 years’ experience in engineering, facilities management, and green building consultancy. He has led a wide range of projects, from rooftop solar PV installations and large-scale lighting retrofits to water, waste, and energy efficiency initiatives, as well as numerous GBCSA Green Star certifications.
As the Founder of Imbue Sustainability and a Faculty Member and EBP Assessor with the Green Building Council of South Africa, Simon combines technical expertise with a strategic approach to deliver high-performance, sustainable solutions. His career spans leadership roles in both the public and private sectors, underpinned by qualifications in Mechanical Engineering, Project Management, and Construction Management.
Passionate about the outdoors, Simon enjoys sailing, mountain biking, hiking, and fly fishing, and brings the same spirit of adventure and innovation to his work in advancing sustainable practices across the built environment.

Marloes Reinink is the founder and director of Solid Green Consulting, a leading sustainability consultancy in Africa. With an academic background in Innovation and Architecture, she has been a sustainable building consultant for over 20 years in South Africa and Africa. Marloes started Solid Green in 2010, driven by her passion for contributing to a better-built environment and a cleaner planet. Under her leadership, Solid Green has worked on over 200 Green Building projects, offering property developers and building professionals a sophisticated range of consulting services to help them achieve their green building goals. Marloes has been the Sustainability Consultant and Green Star expert on numerous groundbreaking and award-winning green building certification projects in South Africa. In 2017, she expanded her advocacy for a greener built environment by founding GreenED, an online education platform focused on sustainability in the built environment. Additionally, she runs the Regenerative Collaborative SA, an NGO focused on promoting a regenerative built environment. Her outstanding contributions were recognized in August 2018 when she was named Business Woman of the Year: Entrepreneur (Gauteng Regional Awards) at the 4th South African Women in Property Awards (SWAIPA).

Chilufya is an experienced Electro-Mechanical Engineer with a strong background in sustainability-focused design and compliance modelling. Specializing in Green Star project management, he excels in detailed modelling of building systems to optimize energy performance. Using advanced simulation tools like DesignBuilder and EnergyPlus, Chilufya has successfully enhanced building energy efficiency while guiding project teams towards sustainable solutions and away from conventional building practices.
A key challenge across Africa is the lack of electricity generation infrastructure, exacerbated by rapid urbanization. Chilufya is passionate about addressing this issue by ensuring that both new and existing buildings operate with significantly reduced resource consumption.

Chilufya played a pivotal role as the Lead Technical Consultant in developing Nigeria’s Building Energy Efficiency Code (BEEC), a project that holds immense significance in Africa’s most populous country. His work contributed to policies that could reduce building energy requirements by 30 to 50%, marking a critical step toward the impact needed on the continent. This project also allowed him to expand his network of experts in sustainable building practices across Africa.

Additionally, Chilufya is a member of the Green Building Council of South Africa’s Education Faculty and serves on their Project Assessment Panel. Originally from Zambia, he is fluent in English.