Group 26

Board of Directors

Geoff Baker

Non-Executive Chairman


Geoff is a founding shareholder of MACA and has worked in the mining services sector for 40 years, with a focus on plant maintenance and asset management in both operational and management positions. Geoff’s previous Executive duties at the company included responsibility for planning, operating strategy, capital expenditure and delivery of safety and financial outcomes on all projects.

Michael Wright

Executive Chair and Chief Executive Officer – Thiess

BEng (Civil), MEngSc

Michael has over 30 years’ experience across the resource and industrial industries in Australia, Asia, Africa and the Americas. Prior to being appointed to the joint role of Executive Chair and CEO of Thiess, Michael was the CEO of ASX listed CIMIC Group, responsible for leading Sedgman, UGL, CPB Contractors, Leighton Asia and Thiess. He joined Thiess in 1998, starting as a Project Manager, and has held leadership and operational roles in the mining, construction and services sector. Michael serves as a Director of the Minerals Council of Australia and the Sustainable Minerals Institute. Read more.

Craig Morton

Chief Financial Officer – Thiess


For over 21 years, Craig has held senior positions including the role of Finance Director, APAC and Africa for a global EPCM provider. During his time at Thiess, he has held senior finance, commercial and operational positions including the roles of Executive General Manager, Assets and General Manager Finance and Commercial for Thiess’ Australian Mining operations. Craig has been Thiess’ Chief Financial Officer since August 2016 and today holds CFO financial leadership accountability across the CIMIC mining operating companies of Thiess, FleetCo and Sedgman. Read more.

Spencer Jose

Executive General Manager Australia West; Assets (Acting) - Thiess

Spencer joined Thiess in 2007 and has held a number of senior operational and leadership positions. He drives best-for-business outcomes by developing strong relationships with key stakeholders, including clients, suppliers and subcontractors and is a strong advocate for developing people. Prior to his current role, Spencer was the Executive General Manager Asia and Africa and served as Executive Chairman of the Majwe Mining Joint Venture in Africa. He also served as General Manager Mining Western Australia and South Australia where he was instrumental in driving the expansion of Thiess’ underground operations. Read more.

Executive Leadership Team

David Greig

Chief Executive Officer


David has over 20 years’ experience in international mining, construction, maintenance, and infrastructure industries. Early in his career David worked for OEM’s in Kalgoorlie, Western Australia and the USA. This was followed by 12 years as a Regional General Manager for an international mining equipment and maintenance company, spending 6 years working in Australia and more recently six years in North and South America.

Peter Gilford

Chief Financial Officer and Company Secretary


Peter is a finance professional with experience in the areas of financial management, accounting, treasury, insurance, taxation, debt and equity funding. He has provided services to a large number of mining, exploration and construction companies. Peter has acted as Director, Company Secretary and Chief Financial Officer for both public and private companies. Peter holds a Bachelor of Commerce and a Graduate Diploma in Applied Corporate Governance Institute. Peter is a member of the Institute of Chartered Accountants in Australia and New Zealand and an associate member of the Governance Institute of Australia.

Michael Hunt

Executive General Manager - Mining

BEng(Mining), GradCertBus

Michael has over 24 years of experience in Estimating and Technical Services within the mining and civil industries, and has held senior roles with mining contractors for over 15 years.

Linda Devereux

General Manager - People

With more than two decades of experience in HR/corporate services positions, Linda has worked across a diverse range of private and ASX listed organisations. During her career, Linda has held senior and executive level positions within the automotive, ship building, commercial contracting, mining and mining services industries. Linda has a strong passion to drive an effective people and safety strategy across the organisation, whilst providing pragmatic systems and solutions to support business leaders achieve sound commercial outcomes and improve organisational cultures.