Committee Members

Michael Shearer


Ventilation and Compliance Engineer
CPB Contractors
WestConnex New M5 and Sydney Metro
Michael has been a member of the MVSA since 2014 and has been serving as an active committee member of the board. Michael currently works for CPB Contractors based in Sydney as a Ventilation and hygiene Compliance Engineer. Michael previously worked for Glencore fo10 years at the Mount Isa Mines operations where he was employed as the Ventilation Advisor.  Michael currently holds a UNSW Graduate Diploma in underground mine ventilation and a Master’s Degree in Mine Engineering from UNSW. Michael previously ran a promotion and consultancy business for 10 years organising sporting events and consulting in the telecommunications environment prior to joining the team at MIM. Michael is passionate about the health and safety of all those working within the underground environment and hopes to work with government bodies and mining companies to help further improve legislative expectations to benefit the mining and tunnelling industries.

Katie Manns

Katie Manns


Ventilation Engineer
BBE Consulting (Australasia)
Katie is a mining engineer with over 6 years of operational and consulting experience in the underground mining industry.  Katie holds a bachelor’s degree [honours] from the WA School of Mines, an underground shift supervisor’s certificate and an emergency response certificate three.  Prior to joining BBE as a ventilation engineer, she worked for Newmont’s Tanami and Jundee underground operations.  At Newmont, she held the positions of ventilation engineer, drill and blast engineer and scheduling engineer amongst others.

Howard Hindley

TREASURERHoward Hindley #

Managing Director
Mine & Tunnel Ventilation (MTV)
Western Australia
Experienced managing director including business management, business finance, planning, safety, estimating & planning, business law, strategic planning & customer relationship development.
Over 30 years of mechanical & production engineering, design, manufacturing, installation, maintenance, service & prototype development.
Including 20 years’ experience in ventilation fan design, engineering, manufacturing & supply with turn-key installations within the mining and tunnelling industries within Australia.
Design, supply & installation of compact dust collection systems for the tunnel construction industry with most of the major tunnel project within Australia for the last 15 years.

Hannes Steyn


Project Engineer
OZ Minerals
Prominent Hill
South Australia
Hannes has been working in the mining industry for the past 16 years of which the past 13 years have been dedicated to ventilation engineering and occupational hygiene. Hannes gained experience in large international companies like Anglo American and Glencore. He has experience in conventional mining, board and pillar and sub-level open stope mining with regards to ventilation engineering and has project managed the world’s largest gold mine dump recovery operation in South Africa, where he successfully reduced Respirable Crystalline Silica exposures. He relocated to Australia in 2016 where he worked as an occupation hygiene consultant with GCG Health, Safety and Hygiene and project managed various Coal, Metalliferous Mines and Quarry’s operations in Queensland until earlier this year. He currently works for Oz Minerals (Prominent Hill mine) as a Ventilation Engineer.
He completed his Mine Ventilation and Environmental control studies in South Africa whilst working for Anglo American Platinum mines in 2011. He is affiliated with the Mine Ventilation Society of South Africa and is a full member of the Australian Institute of Occupational Hygiene.
He is passionate about health and safety in the workplace and always finds himself thinking of new ways to approach challenges in the workplace.

Jakes Raubenheimer

Jakes headshot (1)COMMITTEE MEMBER

Senior Ventilation Engineer
BBE Consulting (Australasia)
Western Australia
Jakes Raubenheimer has over 32 years’ experience in metalliferous mine ventilation and refrigeration, primarily in an operational role. His operational experience includes working for Western Areas, Anglo Platinum Rustenburg, Union Sections as well as Mount Isa Mines in Australia. Jakes held the position of Senior Ventilation Engineer at the Mt. Isa operations for 5 years where his responsibilities included Enterprise, X41 Copper, George Fisher and the Isa Lead mine. His portfolio included responsibility for the ammonia refrigeration plants, chilled water system as well as surface and underground bulk air coolers. Jakes is familiar with massive ore body mining methods including SLOS, block caving as well as narrow reef stoping methods in gold, copper, lead, zinc and platinum. Jakes is also a fellow member of Mine Ventilation Society of South Africa [MVSSA] and a member of the AusIMM. Jakes obtained his Certificate in Mine Environment Control (Ventilation) from the Chamber of Mines in South Africa and completed a number of modules as part of the British Examination Board – Occupation Hygiene.

Johannes Holtzhausen


Principal Ventilation Consultant
OreTeck Mining Solutions
As a ventilation practitioner, I have headed up ventilation departments at both corporate (group-wide) and Mine wide levels in both Australia and overseas.
I pride myself in being an active member of the Australian mine ventilation Society and hold the grade of Member with the AusIMM.
My love for mine ventilation and my qualifications were obtained in South Africa with a strong focus on Ventilation and Occupational Hygiene management. Technically my experience span over Mining (Deep Level mines, Narrow reef, Trackless, conventional, Sublevel Caving, Board and pillar etc.), Health & Safety (Hold my diploma in Work Health and Safety – Obtained in Australia), Occupational Hygiene and Ventilation systems and related technologies. I have developed a love for ventilation systems design and have had the privilege to put it to practice at multiple brownfield and greenfield projects over the years. It is important to continuously develop and inspire individuals and teams to achieve their objectives and leave a legacy of care, professionalism and success. I look forward standing with you as a proud member of the MVSA and build a legacy of success, pride and professionalism. 

Michael Johnson


Production Coordinator/Ventilation Officer
Pajingo Gold Mine
Charters Towers
Currently studying for my Graduate Diploma for Mining Engineering with the Southern Cross University. 
I am also in the process of gaining qualification as a Ventilation Officer for Metalliferous Mines with SIMTARS.
– 15 years in Underground Mining, a combination of U/G Coal & U/G Metalliferous
– Shotfirer at Pajingo mine
– Underground Supervisor, Deputy (ERZ Controller) of coal mines in Qld – Diploma of U/G Mining
– Mines Rescue member – QMRS
– Member of AusIMM
I feel privileged to be a part of the Mines Ventilation Society of Australia. I hope that I can contribute in a positive way. 

Duncan Chalmers


Senior Lecturer
School of Mining Engineering
University of New South Wales
Duncan Chalmers is a Senior Lecturer in the School of Mining Engineering. His research interests include Mine Explosives, Mine gas management, detection and analysis, Mine Ventilation, Respirable dust detection, and analysis. He is the Chairperson for the Australian Mine Ventilation Conference, Member of the International Society of Explosive Engineers, The Australasian Institute of Mining and Metallurgy, a Fellow of the Institute of Quarrying Australia and has extensive teaching mining and research experience.

Eric Williams


Principal Consultant
BBE Consulting (Australasia),
A mining engineer with more than 40 years’ experience in the field of mine ventilation and cooling.  Has a wealth of operational experience gained working for Barrick Gold Corporation, Olympic Dam, Emperor Gold Mine, Elura Mine, and Goldfields of South Africa.  A career as a ventilation engineer has taken him to sites in Australia, Canada, South Africa, United Kingdom, Fiji, Saudi Arabia and PNG.  Skills include strategic mine ventilation planning, ventilation modelling, primary and secondary ventilation design, fan selection and specification. Also, presents ventilation lectures at the University of Western Australia. The previous position was that as Principal Ventilation Engineer for Barrick Asia Pacific. Presently Principal Ventilation Engineer for BBE Consulting (Australasia)

Murray Jamieson

Murray Jamieson #


Senior Ventilation Engineer
BBE Consulting (Australasia)
Western Australia
I hold a Master’s Degree in Mining Engineering from UNSW (2011) and have been in the mining industry for over 17 years starting in the Cadia Hill open cut mine, transitioning to underground mining in 2009 at the Cadia East Project owned by Newcrest Mining Ltd. I joined the BBE group in 2021 as a Senior Ventilation Consultant.
I have experience in most facets of Underground Mining Engineering Development in Block Caving and Sub Level Caving Methods. I have been on and off in Ventilation since the start of the Cadia East Project. In 2014 I completed the AIOH course in Occupational Hygiene, and in 2015 completed the SIMTARS Mine Ventilation and Environmental Engineering Course.

Lieb Combrinck


Ventilation Specialist & Services, OT Technical and Studies
Rio Tinto
Lieb has 32 years’ experience in the underground mining industry in South Africa, Australia and Mongolia. In 2001 Lieb was promoted as Ventilation, Occupational Hygiene, Environmental and Rescue Manager at Lonmin Platinum. In 2010, Lieb was offered an opportunity to migrate to Australia and was offered the role of Senior Ventilation Engineer at Argyle Diamond Underground Project in the Kimberly Region of Western Australia. Whilst at Argyle Diamond Mine he was promoted to Superintendent Emergency Services, Occupational Hygiene and Ventilation. In 2016, Lieb accepted a transfer to Ulaanbaatar in Mongolia to assist with building the colossal Oyu Tolgoi Underground Project, which will be one of the world’s largest underground copper mines and is located in the challenging Gobi Desert.
At the beginning of 2019 he decided to take a role at the Rio Tinto Offices in Brisbane where he continues to support the Oyu Tolgoi Project as Ventilation Specialist & Services in the Mine Planning and Technical team.
Lieb specialises in ventilation planning and construction of Greenfield mining projects. Besides being a ventilation practitioner, Lieb also has extensive experience in Occupational Hygiene, Mine Rescue and Emergency Management (+15 years),  Mine Heating and Cooling, Environmental Management, Health Safety and Risk Management and Underground Mine Fire Protection.