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Green Building Design Group

about us

100% Black women owned

multi-disciplinary global advisory company

Guiding private and public sector clients to achieve the Sustainable Development Goals (SDGs) within infrastructure projects.

ESG Services - Your global partner of choice in the green economy

Our expertise & combined project team experience of over 40 years working in the green economy includes Climate Change Mitigation and Adaptation, Sustainable Development Goals (7, 9, 11, 17), Energy Performance Certificates, Carbon Reduction, Training and Education, Carbon Market Intelligence, Tax Incentives, Carbon Reporting, Measurement & Verification, ESG Reporting, Energy Services, Circular Economy and Sustainability Strategy Development.

E SDG logo UN emblem square trans WEB 1024x879 1 - Your global partner of choice in the green economy

We are paving the way for an even more collaborative and connected green economy in Africa and the Rest of the World by bringing the relevant stakeholders together through our integrated platforms
12l tax incentives carbon tax green economy
Songo Didiza

Our solutions

Industries we Serve

We are always stronger when we collaborate.

Financial Services
Oil & Gas

Our Research

Multi-Disciplinary Leadership Team

songo didiza

Songo Didiza I Chief Impact & Strategy Officer

Songo is an entrepreneur and a green economy expert who founded the Green Building Design Group (GreenBDG) as a solution to  to create green jobs in South Africa, using innovative and circular approaches. 

Her industry experience spans across the energy, construction, financial services, manufacturing, government, NGO, property, oil & gas sectors in Sub-Saharan Africa.

She has been voted Sub-Saharan Africa’s Energy Innovator of the Year by the Association of Energy Engineers (AEE) in 2019. The award ceremony took place in Washington, DC in September.

She is a trusted global advisor on the green economy and has advised on transactions exceeding USD 1 billion to fast track the green growth in Africa. 


IMG-20210826-WA0017 Sumaya

Sumaya Mahomed | Global Director of Strategy

Sumaya Mahomed is an Renewable Energy expert and has played a pivotal role, having worked in countries in South Africa, Kenya and Uganda. 

Her expertise includes Management Consulting,  Renewable Energy Technologies; Electrical Maintenance Services; Training & Development; Science, Technology, Engineering; Results Based Financing Tools. She has technical experience in developing solar projects of above the 1 MW in size. 

She has a background in Chemical Engineering and Masters Programme in Sustainable Development.  She has registered for a MBA. She is a Board member of the Institute of Energy Professionals Africa (IEPA).

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Helmut Hertzog | Global Director of Operations

Helmut Hertzog is a trusted business advisor in excess of 20 of years’ experience. He manages South African Renewable Energy Business Incubator (SAREBI) which actively focuses on the development and support of small and medium enterprises in the clean energy and resource efficiency sector. He serves as non-executive director to Green Building Design Group, which is incubated by SAREBI. Helmut possesses an MBA.  This includes Proven sales record and negotiation skills, strong ability to assimilate and communicate technical concepts.

He is Creative problem-solver with strong analytical skills and has excellent verbal and written communication skills.  Strong multidisciplinary skills. (Accounts, Marketing, HR, Operations, Manufacturing, Product development)Thembelihle wears two hats: one for strategy and one for coaching. It’s the mystery in problem solving that she finds her passion.


Tebogo Mazibuko

Tebogo Mazibuko | Global Director of Legal Compliance

Tebogo Mazibuko is a non-executive global advisor to GreenBDG.

Tebogo’s contribution includes advisory on business structures, capital raise models, legal review & drafting, and advice on the management of certain stakeholders.

Tebogo has and continues to provide invaluable advice on GreenBDG’s business development strategies.

Tebogo’s enthusiasm for sustainability and green economy matters and support for social impact causes cannot be doubted. All her contributions to GreenBDG have been given with the highest levels of leadership, commitment, professionalism and friendship. Through her assistance to GreenBDG, Tebogo has displayed her intellect and her aptitude in critical thinking, problem solving, drafting, reviewing and research – all with that consistent eye for detail.

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Mutsa Kajese | Global Director of Innovation

Mutsa is the Founder of UbuntuLab, a Personal Growth Hub which focuses on instilling holistic development and to emerging global influencers and leaders globally. The programs under UbuntuLab, focus on personal growth through (re)connecting with your Authentic Self and take the participants on a journey of self-discovery and authenticity.

Mutsa has spoken in Germany, Belgium and was invited to present Ubuntu Education in Sustainable Development at the International Sustainable Transitions (IST) Conference in Sweden. He has trained young teachers in Kenya’s national Youth Empowerment Initiative and is a founding member of the TedX Harare organising committee. He is also the author of 30 Days of Transformation, A Guide to Your Authentic Self, now available on Amazon.

Professionals Africa (IEPA).

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Zadok Olinga | Global Director of Energy Projects

Zadok is an expert in Measurement and Verification (M&V) and Energy Efficiency assisting South African corporate companies obtain cost improvements in their operations. He has carried out M&V inspections and written energy efficiency technical reports on more than 80 projects on the Eskom EEDSM program, the Section 12I tax incentive, and the Section 12L tax incentive.

He has over 10 years of experience in energy efficiency projects, which includes the South African regulatory and tax environment, and knowledge of ISO 17020, SANS 50010, ISO 50001 standards and the IPMVP guideline for M&V. He holds accreditations as a Certified Measurement and Verification Professional (CMVP®) and Certified Energy Manager (CEM®), from the Association of Energy Engineers (AEE). He is the President-Elect of the Southern African Energy Efficiency Confederation (SAEEC). He is currently pursuing a PhD with a focus on microgrid renewable energy systems and optimisation around their implementation.


Our work within the entrepreneurial Network in South Africa

What is the Symmetry Hub? The Symmetry platform connects businesses owners with the tools and service providers who specialise in supporting and accelerating small business growth. We are working with the symmetry hub in providing sustainability advisory support to their entrepreneurial network.