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
Natali Nyabanga
Air Quality Engineer
MEng: Chemical Engineering
Natali is intelligent, focused, and diligent. She maintains a high quality of work while serving in the Advisory department. She has a caring heart and a great sense of humour.
Caitlin Morris
Senior Air Quality Engineer
BSc: Chemical Engineering & LLM
Cait is a superb chemical engineer! She is incredibly bright and her work is flawlessly accurate. Cait heads up our Advisory department with her extensive knowledge of the legislation and solutions to improve air quality.
Sanjana Sevprasad
Air Quality Engineer
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
Senior Air Quality Engineer
MEng: Chemical Engineering
Sasha is fastidious and diligent in her work – a true perfectionist – and of course, we want our clients’ data and reports to be perfect! She is willing, enthusiastic and observant. A true engineer!
Riyaal Cerpath
Air Quality Engineer
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.
Emissions Measurement
Aphiwe Gugushe
Lab Manager & Engineering Admin
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.
Sherri Mason
Engineering Manager
Sherri’s extensive knowledge spanning chemical and mechanical engineering means she is uniquely positioned to lead our team of engineers. She does so with grace, understanding and compassion, while getting the job done to the highest level of quality.
Bevan Uithaler
Scientist and Equipment Technician
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.
Maitaishe Svotwa
Chemical Engineer
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
Chemical Engineer
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.
Matt Findlay
Senior Chemical Engineer
Matt is a bright problem solver and possesses beautiful leadership abilities. As report writer and client liaison, he pulls together all of our departments. It is a privilege to have Matt in our team.
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
Matthew Mwepu
Field Scientist
Matt is one of our most experienced Stack Scientists. With a wealth of knowledge spanning the sampling of all emissions from particulate matter through to dioxins and furans, Matt is our guy! We love his confidence and bold leadership!
Sakhumzi Baliso
Field Scientist
Sakie is one of our best, having years of emissions sampling and laboratory experience under his belt. He ensures our trainees are up to date on their sampling methods. His contagious smile lights up the room!
George Malinda
Field Scientist
Ever the gentleman, George is a valued member of our team who takes his role as field scientist very seriously. We appreciate his humble and teachable attitude and are excited to see his growth.
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.
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.
Nkosi Maphumulo
Field Scientist
Nkosi works hard to learn all that he can and to gain knowledge in every area. We appreciate his positive attitude and helpfulness. He has quickly become an excellent junior scientist.
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.
Mongezi Cele
Air Quality Engineer
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 team.
Administration
Monique Majendie
Commerical and HR
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.
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.
Weyers Marais
General Manager and R&D
Weyers is genuine, kind, authoritative – and a perfectionist in his work. He leads our team with care, and oversees the business on a daily basis. We sit confidently under his thoughtful leadership, as he guides our team to wholehearted client service.
Claire Naude
Administrator
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.
Sean Charteris
Managing Director
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.