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

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

Caitlin Morris

Business Development

BSc: Chemical Engineering & LLM

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

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

Sasha Kasperski

General Manager: Advisory

MEng: Chemical Engineering

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

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

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

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

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

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

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

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

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

Akhanani Shayi

Operations Administrator

BEng Tech (Hons): Chemical Engineering

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

Ray Slinger

Business Development

BSc (Hons): Environmental Science

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

Xolani Gajule

Field Scientist

AdvDip: Chemical Engineering

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

Mandisi Tomose

Field Scientist

AdvDip: Chemical Engineering

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

Dave Vidal-Hall

Junior Field Scientist

BSc Eng: Chemical Engineering

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

Melusi Simelane

Field Scientist

NDip: Chemical Engineering

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

Kevin Nzuzi Swami

Field Scientist

MEng: Chemical Engineering

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

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

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

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

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

Nkosinathi (Smartie) Dube

Groundsman

Nkosi is a man of integrity and humility. He is the caretaker of our JHB premises and has faithfully been on the property since 2006. His nickname is “Smartie” because he knows all there is to know about gardening & maintenance. It is a privilege to have him on our team.

Zoey Energy

Kodi Findlay

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

Weyers Marais

General Manager: Zoey Energy

BTech: Surface Design

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

Danté Webber

Junior Electrical & Electronic Engineer

BSc Eng: Electrical & Computer Engineering

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.