About Us
At the Intersection of Development & Sustainability
Main Signal is an international advisory firm that combines 25+ years of global expertise with deep local market understanding to deliver transformative impact across Africa and beyond.
Our Mission
To accelerate sustainable development across Africa by providing world-class advisory services that bridge global best practices with local realities, driving measurable impact for communities, businesses, and governments.
Our Vision
A world where sustainable development is the standard — where every building, supply chain, and health system is designed for both human prosperity and planetary health.
Our Founding Director
Visionary leadership driving sustainable transformation across Africa and beyond
Elizabeth Wangeci Chege
Founding Director & Chief Sustainability Strategist
Biography
Elizabeth Wangeci Chege is a distinguished sustainability leader and board-level strategist with over 25 years of transformative impact delivering climate-smart solutions across five continents. As Founding Director of Main Signal and Energy Efficiency & Cooling Officer at Sustainable Energy for All (SEforALL), she bridges public and private sectors to influence global and African government policies on sustainable cooling, energy efficiency, and resilient infrastructure.
She serves as Board Secretary of the World Green Building Council — the first Kenyan and the first woman to hold a continental leadership position — where she brings proven expertise in corporate governance, ESG integration, and strategic policy formulation.
As a pioneering force in sustainable development, she co-founded the Kenya Green Building Society and championed the establishment of green building councils across African nations, directly influencing sustainable infrastructure development for more than 700 million people.
Credentials & Certifications
Education
- MSc Sustainable Design Sciences, University of Sydney
- MSc Building Services, University of Sydney
- BTEC Higher National Diploma, Mechanical & Electrical Engineering, UK
Professional Certifications
- LEED® Accredited Professional (BD+C)
- Green Star Accredited Professional
- IFC EDGE Master Trainer of Trainers
- IFC EDGE Expert and Auditor — 1st in East Africa
- Member, Institute of Engineering and Technology, UK (MIET)
Key Achievements
Speaking Engagements
COP28, Dubai, UAE (2023)
Speaker at Sustainable Construction Talks: "Unleashing the potential of sustainable construction in the Global South"
COP27, Sharm El-Sheikh, Egypt (2022)
New York Times Climate Forward Debate participant; Buildings Pavilion interviews on women in energy efficiency
COP26, Glasgow, Scotland (2021)
Keynote speaker on Cities, Regions & Built Environment Day; discussed Africa's opportunity in sustainable construction
Task Forces & Advisory Roles
What Drives Us
Globally Sophisticated
International perspective grounded in deep local market understanding
Impact-Driven
Every engagement designed to deliver measurable, lasting results
Innovative
Forward-thinking solutions at the intersection of sustainability and development
Trustworthy
25+ years of building relationships with governments, corporations, and NGOs
Human-Centered
People-first approach to sustainable development and policy
Pan-African
Continent-wide expertise with a truly global reach