Our Leaders

Graeme brings a wealth of experience to Bis gained from senior leadership and governance roles across the resources, industrial services and power sectors. This has included roles as Managing Director of Broadspectrum and Lihir Gold. Graeme was a senior executive within BHP during a career spanning 30 years, culminating in roles which included President Iron Ore, President Aluminium and President Uranium.

Graeme currently serves as Managing Director and CEO of AGL Energy (since 2021), and Chair of the National Resources Science Precinct and the Western Australian Energy Research Alliance (since 2012). He previously held a Director role with Broadspectrum Limited (formerly known as Transfield Services Limited) from 2012 until 2016.

Simon commenced as CEO in February 2023, joining Bis from Pacific National, Australia’s largest privately owned rail logistics business, and prior to that, Incitec Pivot Limited where he ran the Asia Pacific downstream business in Commercial Explosives and Fertilisers.

An esteemed industry executive, Simon is highly regarded for his relentless pursuit of excellence in strategy, HSE, people development, process optimisation and value creation. He is focused on leading the business safely and efficiently with an absolute focus on stakeholder needs and generating sustained long-term value for our customer and shareholders.

Simon is a Chartered Accountant, holds a Bachelor of Commerce from Deakin University and is a graduate of Harvard Business School Executive Program. 

Emma Stein is currently serving as Non-Executive Director of ASX50 Company Alumina Limited as well as other non-executive roles including Cleanaway, Worley, Infigen Energy Limited and Todd Corporation.

Emma’s executive career involved senior roles in prominent oil and gas companies in the United Kingdom, including roles as UK Managing Director for British Fuels’ Gas Division and UK Managing Director for Gaz de France Energy.

Throughout her career she has amassed experience in the resources, oil and gas and energy sectors. She brings a wealth of knowledge in commercial and strategic matters to the Board.

David Gray is the CEO and Managing Director at Insight Capital Advisors, an independent capital markets and corporate advisory firm. Prior to founding Insight Capital Advisors, Mr Gray was a Managing Director and Head of Equity Capital Markets at J.P. Morgan in Australia and prior to that was a Managing Director and Head of Equity Capital Markets at Deutsche Bank in Australia.

He has also held other senior executive positions at UBS and Siemens. Mr Gray brings a wealth of knowledge to the position, with over 25 years’ experience across investment banking, independent advisory and financial markets. He has been involved in more than 300 advisory roles and capital raisings.

Mr Gray has relevant industry experience having advised extensively in the energy, mining, resources services and transport logistics sectors. Mr Gray has served on the Board of J.P. Morgan Australia, was a Non-Executive Director of ASX listed Consolidated Operations Group and is a member of The Australian Institute of Company Directors (AICD).

Jay Ditmarsch is a member of Carlyle Global Credit and has worked in New York and London. He is currently based in New York.

Prior to joining Carlyle, Mr. Ditmarsch was a member of the Principal Transactions Group at Macquarie Capital.

Mr. Ditmarsch received a Bachelor of Arts in Statistics and Economics from Harvard University.

Harnessing more than 30 years of financial and strategy experience spanning resources, infrastructure and facilities services organisations, Andrew joined Bis as CFO in March 2023.

Whilst he came to Bis from Pacific National where he was Chief Commercial Officer, he has held senior and executive roles both in Australia and internationally at BHP, Broadspectrum (formerly Transfield Services), Greenhill, Helfen and NM Rothschild.

Andrew holds a Bachelor of Accounting from the University of Glasgow.

With more than 15 years mining industry and contracting experience, Layla has responsibility for Bis’ People, Culture and Safety functions; working closely with leaders and functions across the business to develop and deliver proactive and measurable initiatives that keep Bis employees safe, valued and engaged.

Most recently, Layla was Head of Employee Relations for PriceWaterhouseCoopers. Prior to this, she held an Executive role at Mineral Resources for seven years. Earlier in her career, she held senior roles at the Chamber of Commerce and Industry of Western Australia, Worley and Jan de Nul Australia.

Layla holds a Master of Human Resources and Employee Relations, a Bachelor of Commerce and a Bachelor of Arts. 

A seasoned underground mining professional with multi-disciplined industry experience, Adam’s career spans commercial, product, operational and management roles across several underground and mining services companies.  

After joining Bis in March 2020, he held multiple senior roles in our Underground business where he added significant value, particularly in the areas of strategy, process and commercial, before being appointed General Manager – Underground in October 2022.  In September 2023, he became Chief Operating Officer - Underground & Dry Hire and appointed to the Executive team. 

Adam is a graduate of the Australian Institute of Company Directors’ Company Directors Course.

With 30 years directorial, leadership and executive general management experience, Paul joined Bis in June 2023.

His background includes manufacturing, mining and logistics organisations, including BHP (20 years), Danakali and Pacific National. His expertise spans multi-site operations, maintenance management, P&L oversight, project management, continuous improvement and business transformation.

Paul holds a Master of Mining Engineering, a Master of Business Technology, a Bachelor of Chemical Engineering, a Diploma of Business (Frontline Management) and an Associate Diploma of Applied Science (Metals Technology/Metallurgy).

Kristy‘s nearly 20-year career spanning across strategy, commercial and financial disciplines has been dominated by complex business environments in logistics, freight, defence and heavy industry.

Prior to Bis Kristy held a variety of senior leadership roles at Pacific National, BAE Systems and UGL Rail.

A seasoned strategic, business transformation, and optimisation executive. Kristy holds a Bachelor of Commerce and is a Certified Practising Accountant (CPA).