Board of Directors

Meet our Board

Hamish Tyrwhitt MacMahon sustainable mining Independent Non-Executive Director

Hamish Tyrwhitt

Non-Executive Chair
Michael Finnegan MacMahon mining contractor managing director and chief executive officer

Michael Finnegan

Managing Director and Chief Executive Officer
Dharma Chandran - Non-Executive Director, Macmahon

Dharma Chandran

Non-Executive Director
David Gibbs - Non-Executive Director, Macmahon

David Gibbs

Non-Executive Director
Denise McComish - Independent Non-Executive Director, Macmahon

Denise McComish

Independent Non-Executive Director
Grahame White - Non-Executive Director, Macmahon

Grahame White

Non-Executive Director
Hamish Tyrwhitt MacMahon sustainable mining Independent Non-Executive Director

Hamish Tyrwhitt

Non-Executive Chair

Hamish joined the Board as an Independent Non-Executive Director in October 2019.

Hamish has three decades of senior leadership experience in the global engineering and construction sectors. He was the Group CEO of Dubai Financial Market (DFM)-listed construction firm Arabtec Holdings from 2016 to 2019. In addition to his position as CEO of Arabtec Holding, he also held the position of Group CEO of Nasdaq Dubai-listed, interior solutions firm Depa Group, from 2016 to 2019.

Hamish has served on the board as an Executive Director of Depa Limited; as a Non-Executive Director of Design Studio Group Limited, a Singapore based subsidiary of Depa Group listed on the Singapore Stock Exchange; and as a Non-Executive Director of Jordan Wood Industries PSC, a listed Jordanian company which manufactures office and household furniture.

Previous to his roles at Depa Group and Arabtec Holdings, he held the position of CEO at Asia Resource Minerals Plc, an Indonesian coal mining company listed in London.

Previous to this, Hamish worked for more than 25 years with Leighton Group, now CIMIC, where he served as Group CEO from 2011 to 2014. From 2007 to 2011, he oversaw Leighton’s Asian operations as the Managing Director for Leighton Asia, from the Leighton’s Asian headquarters in Hong Kong.

Hamish is a fellow of the Australian Academy of Technological Sciences and Engineering, a fellow of the Institution of Engineers Australia, a member of the Hong Kong Institute of Engineers and a member of the College of Civil Engineers, Australia.

Hamish is a member of the Audit & Risk Committee, Remuneration Committee, Nomination Committee and Tender Review Committee.

Michael Finnegan MacMahon mining contractor managing director and chief executive officer

Michael Finnegan

Managing Director and Chief Executive Officer

Mick was appointed CEO in 2016 and Managing Director in October 2019. He holds a Bachelor of Science (Mining) and has over 25 years of experience in the mining industry. The last 20 years have primarily been spent in senior line management positions. Mick has a strong commercial and technical background and has spent time in operations on the east and west coasts of Australia, as well as in a number of countries throughout Asia.

Dharma Chandran - Non-Executive Director, Macmahon

Dharma Chandran

Non-Executive Director

Dharma is an experienced executive and non-executive director with a background in professional services, law and resources sectors in Australia and Asia.

He has significant experience in the mining and civil contracting and construction sectors, including as the former Group Chief Human Resources Officer for mining and civil contractor Leighton Holdings, ABC, and Dubai Financial Exchange listed Emaar Properties.

He is currently a non-executive director of 7-Eleven Australia and the Committee for Economic Development of Australia, and he is also Chief People Officer of Toll.

Dharma has a Bachelor of Commerce Degree majoring in Marketing, a Bachelor of Laws Degree and a Master of Commerce Degree majoring in Organisation & Management, all from University of New South Wales, and is a member of the Australian Institute of Company Directors.

David Gibbs - Non-Executive Director, Macmahon

David Gibbs

Non-Executive Director

David joined the Board as a Non-Executive Director in July 2023.

He is a mining engineer with 40 years of international experience in large-scale mining operations with copper and gold, diamonds, uranium, coal (thermal and coke), talc and nickel laterite resources. His experience includes both underground and open pit mining across South Africa, Namibia, Papua New Guinea, Australia, Thailand, and Indonesia. He has held positions in the areas of feasibility study management, mine planning, operations, productivity improvement and cost reduction, research and due diligence, strategic planning, and project evaluation and development.

David is a Director of PT Amman Mineral Internasional Tbk, a gold and copper producer listed on the Indonesia Stock Exchange.

He holds a BSc Hons degree in mining engineering, Mine Manager Certificate  First Class for Western Australia and a Mine Manager Certificate from South Africa.  He is a Fellow of The Royal School of Mines (ARSM) and a Chartered Engineer (C Eng).

 

Denise McComish - Independent Non-Executive Director, Macmahon

Denise McComish

Independent Non-Executive Director

Denise joined the Board as an Independent Non-Executive Director in March 2021. She is also a Non-Executive Director at ASX-listed Webjet Limited and Mineral Resources Limited and not-for-profits Beyond Blue and Chief Executive Women.

Denise was a Partner with KPMG Australia for 30 years, and served as a National Board Member and National Mining Leader. She has extensive audit and advisory experience including governance and risk, capital transactions and regulatory filings with national and global companies. She has international experience across multiple sectors, principally in energy and natural resources, financial services and infrastructure.

Denise is a Member of the Australian Takeovers Panel, and Chair of the Advisory Board for the School of Business and Law at Edith Cowan University. She is also a Fellow of Chartered Accountants Australia and New Zealand and a Member of the Australian Institute of Company Directors. Ms McComish was awarded an honorary Doctorate of Business from Edith Cowan University and in 2018, she was recognised in the Top 100 Global Inspirational Women in Mining.

Grahame White - Non-Executive Director, Macmahon

Grahame White

Non-Executive Director

Grahame joined the Board as a Non-Executive Director in January 2024.

He is an experienced executive and non-executive director with a background in the construction, energy and resources sectors in Australia and Asia.

He brings a wealth of experience in engineering, mining and resources, infrastructure and civil contracting, strategy, project technical and commercial analysis, and project development and operations management. During his career, he has spearheaded business development across Hong Kong, Singapore, Thailand, Vietnam, Philippines, China, and Malaysia in the infrastructure and civil contracting sector.

He is currently a Non-Executive Director of Metals X Limited.

Grahame is a qualified mechanical engineer with a Bachelor of Engineering (Mechanical) from the University of NSW, and a member of the Australian Institute of Company Directors.

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I am excited to be joining Macmahon as part of their trainee dump truck operator program and as a Yamatji Wongi woman, I hope to inspire other Indigenous women to reap the benefits of a career in mining.
MacMahon mine traineeship program
Shelley Dimer
DTO Trainee, Telfer
Executive Management Team

Meet our Leaders

Michael Finnegan MacMahon mining contractor managing director and chief executive officer

Michael Finnegan

Managing Director and Chief Executive Officer

Ursula Lummis

Chief Financial Officer
Donald James, Chief Commercial Officer

Donald James

Chief Commercial Officer
Peter Pollard- Macmahon

Peter Pollard

Chief Corporate Development Officer

Elizabeth Gray

Executive General Manager, HSEQ and Training
Nicola Hamilton MacMahon mining contractor people general manager

Nicola Hamilton

Executive General Manager, People
Jason McCallum, Executive General Manager – East Coast Operations and Maintenance

Jason McCallum

Executive General Manager – East Coast Operations and Maintenance

Maha Chaar

General Counsel and Company Secretary
Michael Finnegan MacMahon mining contractor managing director and chief executive officer

Michael Finnegan

Managing Director and Chief Executive Officer

Mick holds a Bachelor of Science (Mining) with 24 years’ experience in the mining industry. The last 15 years have primarily been spent in senior line management positions. He has a strong commercial and technical background and has spent time in operations on the east and west coast of Australia as well as a number of countries throughout Asia.

Ursula Lummis

Chief Financial Officer

Ursula is a Chartered Accountant and holds a Bachelor of Commerce (Honours) degree in Accounting, Auditing and Tax. She joined Macmahon in 2018 as Group Financial Controller and was appointed Chief Financial Officer on 1 November 2021.

Prior to Macmahon, Ursula has more than 20 years’ experience with KPMG South Africa and KPMG Australia providing services to a large number of global listed companies in the mining and mining services sectors.

Donald James, Chief Commercial Officer

Donald James

Chief Commercial Officer

Donald is a Fellow Chartered Accountant with extensive financial and corporate experience in high value private and listed public companies in the mining and industrial services sectors. He has held strategic key executive leadership positions and non-executive director roles in developing and operational entities, within which he has demonstrated a strong focus on delivering high return business outcomes.

Over the past 20 years, Donald has been a member of group executive leadership teams in ASX 200 companies, with specific accountability in roles including Chief Executive – Investments, Chief Operating Officer and Group Chief Financial Officer. With over 27 years of experience, Donald brings financial, strategic, commercial, and operational expertise to the team.

Peter Pollard- Macmahon

Peter Pollard

Chief Corporate Development Officer

Peter holds a Bachelor of Business and joined Macmahon in August 2020 as Chief Financial Officer. In November 2021, he moved into a strategic consulting role and was appointed Chief Corporate Development Officer in November 2023.

Peter has over 40 years’ experience in the contracting and services sectors covering mining, oil and gas, infrastructure and telecommunications. During this time, he has worked and lived in Australia, Asia and the Middle East, working with large international contracting and services companies, including CIMIC Group.

Elizabeth Gray

Executive General Manager, HSEQ and Training

Elizabeth holds a Graduate Diploma in Occupational Health and Safety and a Bachelor of Nursing. She has 20 years of experience in the mining industry in health, safety, environment, training, and community engagement. She has been instrumental in implementing strategies to generate positive HSEQ performance and drive cultural change. Before Macmahon, Elizabeth held senior management positions with Peabody Australia, Sandvik, and BHP (BMA) Daunia Mine.

Nicola Hamilton MacMahon mining contractor people general manager

Nicola Hamilton

Executive General Manager, People

Nicola holds a Bachelor of Human Resource Management (honours). She has more than 20 years of experience in people management with global resources companies, including PTTEP, Beach Energy and Schlumberger. She specialises in building and leading HR functions in diverse climates and cultures with expertise in business and strategic planning, change management, talent management and development, and employee relations.

Jason McCallum, Executive General Manager – East Coast Operations and Maintenance

Jason McCallum

Executive General Manager – East Coast Operations and Maintenance

Jason is a Senior Executive with over 35 years of experience in the mining sector. He joined Macmahon in June 2023 as General Manager East Coast and Civil Operations and was appointed Executive General Manager of East Coast Operations and Maintenance in November 2023.

Jason transforms mining operations in challenging market conditions, connects strategic vision with execution and inspires high-performing teams to deliver technical excellence and continuous improvement.

Before Macmahon, Jason held senior management positions with BHP, Vale Coal and Yancoal.

Maha Chaar

General Counsel and Company Secretary

Maha is a senior executive and qualified lawyer with extensive national and international experience across legal, commercial, governance, and risk in various sectors including resources, infrastructure, mining and commodities, engineering, oil and gas, and construction.

Maha has significant experience advising on large-scale project developments and disputes.  She is also skilled in managing and documenting complex transactions and commercial contracts.

Maha holds a Master of Laws, a Bachelor of Laws (Honours), and a Bachelor of Science. She joined Macmahon in 2021 and was appointed General Counsel in January 2022 and Company Secretary in January 2024. She has authored several published, peer reviewed academic papers and articles.

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What We Do

We provide world-class mining and infrastructure contracting services

Surface Mining

Macmahon’s mining services has established a strong reputation within the resources sector, with surface mining operations in Australia and Southeast Asia.
Surface Mining

Underground Mining

Our underground mining capabilities range from total mine development and production to specialised services to meet the short and long-term requirements of our clients.
Underground Mining

Mining Support and Civil Infrastructure

Macmahon offers a wide range of civil construction, engineering and business improvement consulting services for projects both above and below ground.
Mining Support and Civil Infrastructure