Committee Members

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.

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.

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.

Florian Michelin

Florian MichelinWEBSITE ADMIN

Manager – Howden Ventsim Australia
Howden Ventsim
Florian Michelin is a mechanical engineer, specialising in computational fluid dynamics. HE started as a software developer at Chasm Consulting (now owned by Howden), developing new features and improving simulation algorithms in Ventsim™. He then developed Pumpsim (pipe flow simulation siftware) and has become product manager for Pumpsim, trainer and consultant using Ventsim and Pumpsim. Now, he is manager for Howden Ventsim Australia, responsible for development, sales, training, and consulting activities for Ventsim and Pumpsim products.

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.

Jaco Kok


Mine Ventilation Fan Engineer
Mine & Tunnel Ventilation
Western Australia
Jaco has been working in the metalliferous mine ventilation discipline for over 24 years in various roles. He has extensive experience over a wide spectrum within the ventilation discipline which includes site operational ventilation management, ventilation consulting services and ventilation system engineering.
In 2005 he completed his Chamber of Mines of South Africa Certificate in Mine Environmental Control/Occupational Hygiene and in 2010 he completed his Graduate Diploma in Mine Ventilation at the University of New South Wales. He has also completed his Diploma in Work Health and Safety; completed his Exemplar Global training as Lead Auditor for Safety Management Systems (AS45001); and his Certificate IV in Training and Education (TAE40116).
Jaco is now working at MTV where he leads the Work Health and Safety system management; and continues to apply his experience to provide input into various ventilation solutions for different applications. 

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.