Who we are
Yellow Tree is passionate about the environment and about serving others. We are a team of Chemical Engineers that specialise in Carbon Accounting, Air Quality Compliance, and Emissions Measurement, and we love our work.
Carbon Advisory and Air Quality Compliance

Riyaal Cerpath
Air Quality Engineer
BSc Eng: Chemical Engineering
Riyaal brings a wealth of knowledge to the Advisory department after being a field scientist for many years. He is always first to put his hand up for the odd jobs and to go the extra mile for his teammates.

Caitlin Morris
Business Development
Cait is a superb chemical engineer! She is incredibly bright and her work is flawlessly accurate. Cait is pioneering new developments in the field of low carbon energy production.

Sanjana Sevprasad
Air Quality Engineer
BSc Eng: Chemical Engineering
Sanjana’s knowledge of chemical engineering aids in her excellent work in air quality consulting. When she’s not mulling over calculations, she enjoys cooking and baking for her friends and family.

Sasha Kasperski
General Manager: Advisory
Sasha has stepped up to take charge of the Advisory department with kindness and care, while making sure work is done to the highest level of accuracy. She leads with humility and integrity.

Sherri Mason
Quality Manager
BSc: Mechanical Engineering
Sherri’s extensive knowledge spanning chemical and mechanical engineering means she is uniquely positioned to support the Advisory team through rigorous reviewing controls. She’s also the powerhouse behind our ISO accreditation and keeps us all in line with her firm but friendly ways.

Denham Lailvaux
Air Quality Engineer
BEng: Chemical Engineering
Denham is fastidious and hard working. Supporting Riyaal in helping our clients meet their greenhouse gas submission and carbon tax deadlines, we are thankful to have him in the team! His previous work on the mines has equipped him with superb knowledge.

Sakhumzi Baliso
Air Quality Engineer
NDip: Analytical Chemistry
Sakie is one of our best, having years of emissions sampling and laboratory experience under his belt. He now lends his expertise to matters of compliance, especially regarding NAEIS submissions. He always offers great service to our clients and is a joy to work with.
Emissions Measurement

Aphiwe Gugushe
Operations Manager
MSc: Chemistry
Aphiwe’s enigmatic nature and productive work ethic ensure that our internal Yellow Tree laboratory operates efficiently and at the highest accuracy. We are delighted to have Aphiwe in our precious team.

Athandile Meji
Lab Technician
AdvDip: Chemical Engineering
Athandile is a steady and consistent scientist who is always happy to serve, and is working his way up the business through applying himself. He runs the internal lab and manages external laboratories in SA and the UK.

Monique Majendie
General Manager: Emissions Sampling
NEBOSH
Monique is a strong, kind and authoritative leader who serves those around her sacrificially. She is resilient and we are blessed to have her caring for our people and stewarding our finances.

Maitaishe Svotwa
Air Quality Engineer
AdvDip: Chemical Engineering
Maitaishe is a diligent, intelligent, hard-working teammate who supports in the report writing department. She is always willing and helpful, and quietly gets things done with excellent speed and accuracy.

Sonali Needhi
Air Quality Engineer
BSc Eng: Chemical Engineering
Sonali joined us in the report writing department and has done well to keep up with the demands of data processing. When she’s not sifting through numbers, she’s a passionate foodie who never eats at the same restaurant twice.

Akhanani Shayi
Operations Administrator
With her bright energy, Akhanani has been a great asset to the team in keeping the operations running smoothly. Her ability to get things done is impressive!

Ray Slinger
Business Development
Ray is effervescently joyful. His excellent communication skills, warmth and professionalism make him a Yellow Tree ambassador of whom we are very proud. They say that one should lead with the heart of a servant, and serve with the heart of a king. That is Ray!
Field Scientists

Xolani Gajule
Field Scientist
Xolani’s tenacious spirit means no problem is too challenging for him. He takes great pride in the accuracy and orderliness of his work. We’re proud of the way he has stepped up to lead the Johannesburg team with compassion and confidence.

Mandisi Tomose
Field Scientist
Mandisi is a humble, hard-working, and smart young man. He is the most teachable person we’ve ever known, with an insatiable appetite for knowledge. As a young scientist and equipment technician-in-the-making, his future is blindingly bright.

Dave Vidal-Hall
Junior Field Scientist
David is an intelligent young graduate who enjoys applying his mind to calculation based problem-solving. He does his work with diligence and a great sense of humour.

Melusi Simelane
Field Scientist
Fresh from university, Melusi has taken every opportunity to learn and grow in his role as a field scientist. Always keen for a challenge, he steps up to the plate and doesn’t quit.

Kevin Nzuzi Swami
Field Scientist
Kevin has a humble assurance about him and he takes ownership of every task to the fullest. We’re exicted to see what lies ahead for this intelligent and friendly young man.

Mongezi Cele
Field Scientist
BSc Eng: Chemical Engineering
Mongezi has the warmest smile you’ll ever encounter and can make anyone feel at ease. His determination to succeed and overcome challenges is inspiring. His tenacious spirit and dedication make him a valued member of the Advisory team.

Bevan Uithaler
Scientist and Equipment Technician
NDip: Chemical Engineering
Bevan has grown in leaps and bounds since joining our team. From field scientist to equipment technician, he is always willing to step up when needed, especially to help out a teammate.
Administration

Sean Charteris
Managing Director
BSc Eng: Chemical Engineering
Sean is a Chemical Engineer with a wealth of experience in combustion, energy generation and industrial emissions. He is passionate about the environment and loves people.

Claire Naude
Financial Administrator
BEd: Foundation Phase
Claire is friendly, dependable, and wonderfully organised. She runs the administration at Yellow Tree with seamless efficiency and brings joy and warmth to all those who engage with her.

Nkosinathi (Smartie) Dube
Groundsman
Zoey Energy

Kodi Findlay
R&D
BEng: Electrical & Engineering
Kodi’s positive, friendly attitude makes him a pleasure to work with. He is a passionate electrical engineer who gets to have all the fun playing the “mad scientist” in the research and development team. We can’t wait to see what he creates next.

Weyers Marais
General Manager: Zoey Energy
Weyers is genuine, kind, authoritative – and a perfectionist in his work. He leads the research and development team with a pioneering mindset where no challenge is too big to figure out.

Danté Webber
Junior Electrical & Electronic Engineer
This young graduate joins us in the R&D department to work on some exciting new things. His technical knowledge is sublime and he gets stuck into his tasks with grit and determination.