Amanda Lee - Contaminated Land Auditor

Amanda Lee is a multi-disciplinary professional with over 23 years of experience in the contaminated land industry. Amanda is a highly motivated and resourceful individual who provides practical and pragmatic solutions to complex issues. She has a proven track record of delivering programs on time, within scope, and meeting or exceeding client expectations.

She has a diversity of experience in both the private and public sector and has an excellent understanding of the key factors that drive decisions including profit and policy considerations. Amanda has worked within a number of teams and has provided leadership, training and mentoring to a range of technically diverse individuals, helping both the teams and individuals within them achieve success. She has experience in roles of contestability to improve efficiency and effectiveness of government program outcomes.

Amanda has worked on numerous human health and ecological risk assessments for a diverse range of clients.

Amanda is an accredited New South Wales, Victoria and Queensland Contaminated Land Auditor appointed by the respective Environment Protection Authority. She is also accredited by National Association of Testing Authorities, Australia (NATA) as an assessor for chemical testing.

Angela Ruthenberg - Human Health Risk Assessment

Angela Ruthenberg has 13 years experience working as an environmental consultant on contaminated sites. Her experience has been gained working on a range of manufacturing, industrial, food and beverage, petrochemical and residential sites for a variety of private and public sector clients.

Angela’s primary area of expertise is the preparation of human health risk assessments (HHRA). Angela is a technical leader and educator in the assessment of vapour migration. Her experience in human health includes the detailed evaluation of exposure using a range of field investigation and modelling techniques and evaluation of toxicology relevant to the evaluation of risk for a variety of land use scenarios.

Her technical knowledge and practical experience includes phase I and phase II site investigations of both organic and inorganic contaminants; intrusive investigations; groundwater monitoring well installation and sampling; and soil vapour and sub-slab installation and sampling.

Angela is also an experienced site auditor technical expert support member which highlights her knowledge of regulatory legislation and guidelines.

Ben Hunter - Environmental Remediation

Ben Hunter has 11 years of experience in environmental remediation, ranging from a complex groundwater through to bulk earthwork soil remediation sites for a diverse range of clients.

Ben has extensive experience with legacy and complex contamination such as per and poly fluoroalkyl substances (PFAS) delivering the first successful large scale soil stabilisation remedial program in Australia.

Ben has planned and executed bio-remediation projects which have reached auditor approval and sign-off. Ben’s experience has been leveraged across a number of programs with clients identifying his skills in on ground and stakeholder management and engagement.

Ben has participated in research programs looking at immobilisation of soil with various amendments for PFAS as well as emulsified vegetable oil and sodium lactate injection aiding bioremediation for chlorinated solvents. 


Serena Thomas - Contaminated Land

Serena Thomas is an environmental scientist with five years of experience in the assessment and management of contaminated land.

Serena has achieved successful outcomes for a variety of private and public sector clients primarily through the delivery of Phase I and Phase II site investigations and the provision of data management support. She has also provided project management support, conducted environmental due diligence reviews, and acted as an auditor assistant for a broad variety and scale of industrial, commercial and residential sites across Australia.

Serena has strong pattern recognition skills and excels in tasks that require a high attention to detail. She is skilled in data validation and the use of environmental data collection, management and analysis software. Serena’s practical experience includes soil logging, groundwater monitoring well installation, and sampling of soil, groundwater, surface water and sediment.

Braiya White - Hydrogeologist

Braiya White has 4 years experience working as an environmental consultant in the field of hydrogeology.  Braiya has been responsible for the preparation of technical hydrogeological reports, groundwater management plans and environmental impact assessments. She has also undertaken site-specific  investigations and remediation risk assessments for groundwater contamination projects, as well as periodic compliance reporting for client site management.

Braiya is an auditor assistant  for the Lucas Heights Industrial Waste Collection Facility in NSW, and a clay target shooting club located in Wangaratta, Victoria impacted by lead and PAH contamination.

Braiya has assisted in the development and construction of numerical groundwater models for resource extraction and contaminated land projects and investigations.

Braiya has a thorough understanding of environmental law and policy, recently completing studies focusing on national and international environmental law.

Thomas Lancaster - Environmental Engineer

Thomas Lancaster is a recent honours graduate of UNSW, completing a Bachelor of  Civil and Environmental Engineering in 2021.

While studying, Thomas was a Transport for NSW Scholar and participated in their cadet development program from 2018-2021.

Thomas completed a research thesis looking at factors which impact the reductive defluorination of PFAS. 

Thomas is assisting as an auditor assistant on a number of audits in NSW and is participating in water resource field programs.

Natasha Vella - Environmental Scientist

Having recently graduated from the University of the Sunshine Coast, Natasha Vella completed a Bachelor of Environmental Science, minoring in restoration and conservation. Natasha worked within the Threatened Species Program for the Department of Environment and Science (DES), initially as an industry placement student and later as a Wildlife Officer for the Bushfire Recovery Program. Throughout her time with DES, her tasks included GIS site mapping, vegetation BioCondition and fauna surveys and assisting in various other fieldwork activities.

As a trainee for the Bundaberg Regional Council, Natasha completed a Certificate III (TAFE Qld) in Business Administration while supporting the Infrastructure Services directorate. She then worked as an Administration Officer for the Bundaberg Regional Council, conducting a digitalisation of plumbing applications project. Utilising these experiences, Natasha provides valuable assistance to the SAGE team by offering analytical and administrative support.


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