Management Team

Mr Graeme Sumner

Mr Graeme Sumner Chief Executive Officer

Mr. Sumner is a highly experienced executive specialising in developing and expanding companies in a broad range of sectors and across a number of geographical regions.

Previous roles have included being the Chief Executive Officer and Managing Director of Service Stream Ltd, Chief Executive Officer of Transfield Services (New Zealand) Limited and Managing Director of Siemens Ltd in New Zealand. He served in senior positions at IBM, Telecom New Zealand, Contact Energy, New Zealand Post and its subsidiary companies, SkyRoad and Kiwimail. Mr. Sumner was also the Chairman of New Zealand Post’s joint venture airfreight company, AirPost Ltd.

Mr. Sumner has a Master of Business Administration and Bachelor of Commerce from Auckland University.

Mr Neville Walker


Mr. Walker is a Fellow Certified Practicing Accountant with forty years of experience across a wide range of industries including telecommunications, manufacturing, automotive and mining and energy.

He has worked directly and in alliances with a number of iconic Australian and international companies including Siemens, BlueScope Steel and BHP. Mr. Walker has performed in substantial, broad roles encompassing finance, commercial, IT and procurement for several divisions of Silcar and Siemens.

Mr. Walker holds a Bachelor of Business (Acct), two post-graduate qualifications from RMIT University and is a Graduate Member of the Australian Institute of Company Directors.

Mr Martin Johnston (CEng)


Mr. Johnston joined ABT in June 2012 after a 14 year career with Triumph Motorcycles - overseeing the design and development of various new motorcycles.

He has extensive experience of new product releases, design, supplier liaison and manufacturing. Martin is responsible for all aspects of ABT's Mining Products, including customer service, sales, engineering and quality.

Mr. Johnston holds a Bachelor of Engineering from the University of Bradford in Mechanical Engineering and Management and has been a Chartered Engineer with the IMechE since 2005.

Board of Directors

Mr Bruce Grey

Mr Bruce Grey CHAIRMAN AND NON-EXECUTIVE DIRECTOR, Appointed 30 June 2013

Mr Grey was Managing Director of Advanced Manufacturing CRC Limited until April 2014. He is a Non-Executive Director of CAP XX listed on the London Stock Exchange. He is also a Director of the Murdoch Children’s Research Institute and a Director of the Victorian Clinical Genetics Services. He has been an Executive Director of two Australian public companies, was Chairman of a German JV between Bishop Technology Group Limited and Mercedes-Benz Lenkungen GmbH for 10 years and was Chairman of the Federal Government’s Advanced Manufacturing Action Agenda. Mr Grey also served as a member of the Federal Government’s Future Manufacturing Industry Innovation Council until June 2012.

Mr Grey is a Fellow of the Australian Academy of Technological Sciences and Engineering. He is a member of the Expert Advisory Panel for the Victorian Government’s Technology Voucher Program and served as Chairman until June 2014. In March 2012 he was appointed a member of the Federal Government’s Clean Technology Investment Committee. He is a Member of the Australian Institute of Company Directors.

Mr David Slack

Mr David Slack NON-EXECUTIVE DIRECTOR, Appointed 9 September 2009

Mr Slack is the founding Managing Director of Australian equity fund manager Karara Capital Pty Ltd. Karara was established in 2007 and now has around $3.4 billion in funds under management. Over the past 30 years, Mr Slack has made a significant contribution to the Australian funds management industry. Notably, he was co-founder and joint managing director of Portfolio Partners Limited, which was sold to Norwich Union in 1998. Prior to that, Mr Slack was a founding executive director of County Nat West Investment Management, where he was head of Australian Equities. He was a non-executive director of the Victorian Funds Management Corporation until 2007, holding positions of deputy Chairman and Chair of the Board Investment Committee. David has a Bachelor of Economics with Honours and is a fellow of FINSIA. He is a member of the Australian Institute of Company Directors.

Mr Adam Levine

Mr Adam Levine NON-EXECUTIVE DIRECTOR, Appointed 9 April 2013

Mr Levine, a lawyer by profession, has over 20 years national and global experience in structuring and executing private equity investments and corporate finance transactions both as legal advisor and a principal investor.

The founder and Executive Chairman of law firm R.B. Flinders, Mr Levine has grown the Melbourne based legal firm from a boutique M&A practice established during the height of the 2008 GFC, into Private Client 2.0 - a next generation, relationship driven, client centric law firm.

Mr Levine is also the Executive Chairman and founder of Rockwell Group Holdings, the head principal investment vehicle of the Rockwell Group which undertakes investments into regulated financial, professional and healthcare service businesses. Mr Levine’s extensive private equity experience and proactive investment practice have been the major contributory factor to the Rockwell Group’s success with a portfolio IRR return in excess of most leading national and global private equity funds.

His current directorships include Rockwell Group Holdings Pty Ltd, Rockwell Financial Services Group Pty Ltd, Rockwell Bates Pty Ltd, Rockwell Investments Pty Ltd, RLDO Pty Ltd, FMD Financial Pty Ltd, and a number of other private companies. Mr Levine is also the founder (with his wife) and Chair of the Rockwell Foundation, a private ancillary fund, which focuses on supporting opportunities for under privileged youth. 

 Mr Mark Lindh


Mr Lindh is a corporate advisor with over 15 years experience in advising mining and resources companies with a particular focus on the energy sector.

Mr Lindh is a founding director of Adelaide Equity Partners Limited, an investment and advisory company.