SESL Australia has evolved over 30 years and is now one of Australia’s leading environmental, soil, water and plant science laboratory and consultancy service.  Established in Sydney in 1984 by Simon Leake, SESL has a network of offices across Australia including NSW, VIC, QLD and the ACT this provides our clients with consistent quality and local knowledge. 

The breadth of experience from within our multi-disciplinary team of scientists means we can support faster decision making, collaboration and the timely delivery of desired outcomes.

We partner with a wide range of industry sectors from government,  private enterprise and multi-nationals.

Our strength is in our team’s ability to “Bring the Science” and work with our partners to deliver environmental benefits, sustainable solutions and sound financial returns.


Simon Leake
Principal Soil Scientist and Founder

Simon is Technical Director and soil science subject matter expert at SESL and enjoys mentoring the SESL team and encouraging the objective application of science knowledge to solve client problems. Simon is also an expert in soil/vegetation rehabilitation and reconstruction such as in mine sites and urban renewal projects.

Andres Grigaliunas
Principal Environmental Scientist / NSW Environment Manager

Andres has significant professional experience in a wide range of services including contaminated land (including hazardous material assessments, acid sulfate soils and remediation supervision), environmental assessments, marine ecology and environmental auditing. His extensive experience in a wide range of areas allows him to provide a comprehensive and holistic approach to projects generating a cost-effective solution benefiting the stakeholders involved.

Samantha Grant-Vest
Environmental Scientist / NSW Resource Recovery Manager

Samantha is a horticulturist and environmental scientist with extensive project management experience. Samantha held the role of senior horticulturist within the media industry for ten years; a role in which she consulted on plant nutrition, pests and diseases and suburban landscape design.

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Peter Somerville
Senior Victoria Soil Scientist

Peter is a Senior Soil Scientist and based in Melbourne where he works as part of the soil science team.  Peter received his PhD looking at methods to improve the establishment and growth of trees in degraded urban soils.  He is an expert on improving the physical and chemical properties of degraded urban soils to enhance the growth and vitality of plants.


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Jane Koo
Environmental Scientist

Jane is an environmental scientist with previous experience in waste and resource recovery operations within the public sector. She developed a passion for ecological conservation throughout her studies and has a vested interest in utilising organics recycling processes to optimise waste diversion and sustainability.

Owen Guy
Soil Scientist

Owen is part of SESL's Soil Science team with field experience in soil surveying and assessment for agricultural suitability. Owen comes from an agriculture background and developed his knowledge of soil chemistry and physics through his studies. He is especially interested in the interactions of soil physical and chemical characteristics with specific cropping and landscape application.

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Setareh Pour Kazemi
Environmental Scientist

Setareh is an environmental scientist with more than 3 years experience in contaminated land management, completing her masters degree in environmental engineering management at University of Technology Sydney. 


Joining SESL in 2019 as an environmental consultant, Setareh has developed her project management experience and consulting skills across a range of areas including contaminated land assessment, acid sulphate risk assessments, waste classification, water monitoring, vapour monitoring and remediation of contaminated land.

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Nileshni (Neena) Goundar
Client Service Manager

Nileshni (Neena) Goundar is the Client Services Manager at SESL. She completed her Diploma in Industrial Laboratory Technology in Fiji.
Neena comes from the Science background with more than 20 years of experience in
Laboratory, Quality Assurance, Sample Receipt and Client Services.
Neena deals with clients on daily basis building relationships with them while ensuring their needs are met. She is also expert in Lab Quotations and Lab Reporting.


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Russell Wilson
Laboratory Manager

Russell (B. Sci - Applied Chemistry) has 20 years’ experience in Laboratory Management. His experience in growing laboratories and mentoring staff is a great asset for SESL Australia.

His enthusiasm and communication skills allows him to achieve excellent results and foster productive relationships with both customers and staff members.

Russell has a strong commitment to Safety and is highly motivated to continuously seek improvement in all aspects of the Laboratory workflow to ensure the efficient testing and timely release of our analytical results

Ian King
InOrganics Laboratory Supervisor

Ian studied Geophysics at university and has been with SESL for over 20 years. In that time Ian has gained experience in a wide range of testing including method development and troubleshooting. Ian has a solid understanding of agricultural, horticultural, environmental and physical properties testing using instrumentation such as ICP-OES, high temperature combustion analyser, UV-Visible spectroscopy.

My Chi Mai
Quality Assurance

With over 30 years experience in instrumental analysis and quality certification, developed at highly respected oganisations, My Chi is motivated to continuously improve SESL’s quality control keeping us at the forefront of quality and efficiency.


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Deanne Waldron
General Manager

From international hotel chains and travel companies, to running a ground-breaking technology company, Deanne has coached and trained thousands of people across ten countries and helped numerous companies successfully implement new systems and business processes, open in untapped markets and launch new products and brands from scratch.


Working with everything from niche SMEs to large listed corporates and a number of Australia’s best-known brands, most recently she was the Chief Information Officer and Head of People, for a leading travel management company.


Deanne joined SESL Australia in November 2021 to focus on People, Processes and Purpose, and has overall responsibility for the management of our business.

Harrison Leake
Director / Facilities, Assets & Systems  Manager

With over 15 years experience in system development at SESL, Harrison is motivated to continuously improve SESL’s technology and methodology keeping us at the forefront of quality and efficiency. Harrison’s primary interest has always been in implementing good science and technology solutions to improve environmental outcomes.

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