Our People

Mine Earth is a group of qualified professionals with skills covering a range of disciplines.
  • Shannon Mackenzie

    BAppSc(EnvMgt), BSc(Hons)(Geol) 

    Since graduating in 1998, Shannon has worked in the mining industry in both operational roles and as a consultant. He has managed numerous multidisciplinary mine closure projects in Australia and overseas.

    Shannon has worked in Australia and Papua New Guinea in the field of mine closure, including project management of closure projects, closure cost estimation, stakeholder engagement, assessments of mine waste, landform design, closure options assessments, groundwater and surface water investigations and other technical studies.

    He applies his geological skills to assess the geochemical and physical properties of mine waste and develop effective recommendations for their management. Shannon’s experience in this field enables effective design and implementation of programs to assess mine waste including geological interpretation and targeted sampling and testwork.

    Shannon has been instrumental in developing leading approaches to mine closure and since 2006 has presented papers at national and international conferences on mine closure.

    Apart from his experience in the field of mine closure, Shannon has worked as a mine geologist, exploration geologist, mining environmental advisor and contaminated sites advisor.

    Shannon’s unique skills and experience contribute to effective closure outcomes.

  • Stacey Gregory

    Principal Consultant
    BSc(EnvSc), MSc(EnvBio)

    Stacey has worked in the mining industry since 1999 in both operational roles and as a consultant. She has widespread experience in rehabilitation planning and monitoring, development of closure objective and criteria, environmental impact assessments and baseline studies.

    Stacey has led numerous large scale and multi-disciplinary projects investigating mining environmental impacts and developing key performance indicators. She has designed targeted closure performance monitoring programs and has monitored rehabilitation at over 20 mine sites within Western Australia. Her focus is the compilation and analysis of data to ascertain the risks and requirements for closure. This has led to the development of acceptable closure objectives and criteria to support effective relinquishment targets for a number of mining projects.

    Stacey has presented papers at both national and international conferences, and has published a paper in Hydrobiologia the international journal of aquatic sciences. In 2005, Stacey received a research grant from the Minerals and Energy Research Institute of Western Australia and subsequently published a report titled “The classification of inland salt lakes in Western Australia”.

    Stacey joined Mine Earth as a Principal Consultant in 2010 and contributes a unique blend of project management and analytical skills that compliment successful mine closure planning.

  • Elis Smedley

    Senior Consultant

    Elis is an environmental engineer and has worked as a consultant in the environmental field since 2004. He has worked on a range of environmental and engineering projects, predominantly within the mining industry in Western Australia. Elis has focussed on mine closure, landform design and surface water management.

    Elis was awarded a Bachelor of Engineering (Applied Ocean Science Engineering) with Honours from the University of Western Australia. During his career Elis has worked as a project engineer and project manager for a range of mining and government clients, including Atlas Iron Limited, Rio Tinto Iron Ore, BHP Billiton Iron Ore, Newmont, Fortescue Metals Group, Main Roads Western Australia and the Water Corporation. Elis has coordinated closure projects for a range of resources including iron ore, diamond, mineral sands, garnet, asbestos and gold.

    Elis joined Mine Earth as a Senior Consultant in January 2013 and contributes practical engineering skills to support effective closure planning and implementation.

  • Matt Braimbridge

    Senior Principal

    Matt joined Mine Earth in 2018 after 13 years at a large Perth based consultancy, 5 years at the UWA Centre for Land Rehabilitation (CLR) and 4 years at Agriculture Western Australia. During his career he has managed projects investigating a broad range of issues in the mining industry, focussing on soil / mine waste characterisation and management for optimal rehabilitation and closure outcomes. Matt has worked on over 50 mine sites throughout Australia and has contributed to numerous scientific papers and conference proceedings.

    Matt’s areas of technical expertise include soil and mine waste physical properties, soil-water relations, soil profile morphology, soil erosion and amelioration to inform landform design, rehabilitation and mine closure.

    As a consultant, Matt has worked with Gold Fields Ltd, Atlas Iron, Newmont, KCGM, Rio Tinto, Worsley Alumina, BHP Billiton Iron Ore, Chevron, Flinders Power and Iluka. In addition to his research and technical roles, Matt has worked as Project Management and Commercial Lead for a large Perth based consultancy, and successfully managed and delived large-scale multidisciplinary projects.

    Matt’s skills and experience across a wide range of disciplines and operational scenarios provides a unique capability to deliver technically sound, pragmatic and cost effective solutions for mine approvals, mine planning, operational and mine closure projects.

  • Nicole de Kever

    Principal Consultant
    BSc(Hons)(Geol), BA(Arch), MAIG

    Nicole contributes an excellent range of analytical, report writing, mapping and project management skills to support successful mine closure planning.

    Since graduating in 1998 Nicole has held exploration geology positions in various exploration and mining companies including Great Central Mines, Placer (Granny Smith), Mount Burgess Mining, Altura Mining and Thunderlarra Exploration.

    Nicole, a Member of the Australian Institute of Geoscientists, has managed numerous projects in a diverse range of environments and locations within Australia and Africa. She has worked on a range of commodities including gold, base metals, uranium and diamonds.

    During her career, Nicole has been responsible for employing, training and supervising project staff, establishing field operations, and planning and managing drilling and geophysical programmes and earth moving contracts.

    Nicole’s specialised geological and mapping skills have contributed to the development of effective closure strategies for a number of waste rock landforms in the Western Australian Goldfields and the Pilbara.

  • Sarah Perry

    Principal Consultant
    BSc(Hons)(Soil Sc.)

    Sarah trained as an environmental geoscientist and has worked in the area of environmental approvals and soil science in both government and consulting roles since 2000.

    Sarah has worked within the (then) Environmental Protection Authority Service Unit, where she was responsible for conducting environmental impact assessments throughout Western Australia in accordance with the Environmental Protection Act 1986, on behalf of the West Australian Environmental Protection Authority.

    Sarah has held a number of environmental consulting roles where she has developed skills in soil and waste characterisation and environmental approvals and management. Sarah has a comprehensive understanding of West Australian and Commonwealth environmental legislation and the environmental approvals process and has a demonstrated ability to successfully negotiate with regulators. Sarah has the ability to manage complex multi-disciplinary projects and is highly skilled in the preparation of environmental approvals documentation.

    Sarah joined Mine Earth in 2015 and her combination of geoscience skills and environmental approvals and management knowledge contributes to successful mine closure planning.

  • Glendon Wesley

    Senior Consultant

    Glendon is an Environmental Geologist who has worked in site based roles since 2004. Glendon has worked as a Mine Geologist at numerous Projects in Western Australia including Granny Smith, Raleigh, Higginsville, Andy Well and Leinster Nickel Projects. He was additionally involved in the South West Native Title Settlement project work for the Department of Mines and Petroleum.

    Glendon was awarded a Bachelor of Science (Applied Geology) with honours and a Master of Science (Environmental Geology) from Curtin University of Technology. During his masters, Glendon focussed on environmental geochemistry, geophysics and hydrogeology.

    Glendon joined Mine Earth as a Senior Consultant in February 2016 and uses his practical geological skills for undertaking assessments of in-situ and as-dumped geochemical and physical properties of waste rock. His environmental geology knowledge also contributes to an understanding of the behaviour of soils, rock and water which are essential components of rehabilitation and mine closure plans.

  • Emily Denholm

    Environmental Engineer
    Engineer, BSc (EngSc & Mgt), MEng (EnvEng)(Hons)

    Emily is an Environmental Engineer who has worked in site environmental and engineering roles since 2015. Emily has attained a Master of Professional Engineering (Environmental) and a Bachelor of Science (Eng) with Honours from The University of Western Australia.

    Emily has experience working for a Tier 1 civil contractor in the Goldfields, Wheatbelt & Perth Metropolitan regions. During her career Emily has worked as a Site Engineer on various projects for Main Roads Western Australia, the Northam Solar Farm and Graham Farmer Freeway Tunnel maintenance projects. Her responsibilities have included supervising subcontractors and ensuring capital works projects were delivered safely and within quality, schedule and budget constraints.

    Emily joined Mine Earth in January 2020 and her combination of site engineering and practical skills allow her to contribute effectively to mine closure projects.
  • James Barrett

    Environmental Consultant
    BSc (EnvSc & Geo), MSc (EnvSc)

    James is a UWA graduate having successfully completed a Bachelor of Science majoring in Geography and Environmental Science. Additionally, James has undertaken a Masters with a specialisation in Land and Water Management. James joined the Mine Earth team in 2021 and brings with him an enthusiastic and determined approach to all areas of his work.
  • Samantha Ross

    Business Administrator

    Samantha joins Mine Earth with over 15 years administrative and project coordination experience. Samantha commenced her career in the legal industry, providing executive assistance to corporate services teams in both Perth and London.

    Since that time, Sam has gone on to support several organisations by providing accurate, detailed administrative assistance across work areas including human resources, event and project management, client liaison, and marketing and social media.

    Sam utilises her strong organisational management and administration skills to assist the Mine Earth team to run smoothly, on time and on budget.

Our Clients

Our Clients

Contact us


+61 8 9431 7318
+61 407 997 551


Unit 1/94 Forsyth St
O'Connor WA 6163