Our leaders

  • Jason Spears

    Jason Spears

    Managing Director
    Jason has 25 years’ experience working in Australia and internationally as a professional engineer and business leader in the resources, civil infrastructure and building sectors.
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    Jason joined the CIMIC Group in 1999 and was previously the Managing Director of UGL. Prior to that he was the Executive General Manager, Major Projects and NSW, at CPB Contractors and also held senior roles at Thiess.

    He has led successful outcomes on major projects and in construction and services across some of Australia’s largest and most complex infrastructure and resources projects. He has held roles in project management, general management and executive positions. Building strong teams that are client focussed, results driven, and with safety at the forefront, has been key to achieving successful outcomes.

  • Don Johnson

    Don Johnson

    Chief Operating Officer & Executive General Manager - NSW & ACT, Major Projects & Tunnelling
    Don has more than 30 years’ experience in the Australian construction industry. Holding several senior executive construction and engineering roles, Don has led both the tendering and execution phases on some of the country’s largest infrastructure projects across all major sectors.
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    Don’s track record and significant project management experience, most recently as Bid Director and Project Director responsible for the successful delivery of the $2.7 billion WestConnex M4 East in Sydney, have solidified his reputation as an innovative leader with an open, communicative style and risk-based approach to all projects.

    Don holds a BE Civil Engineering (Hons) from the Queensland Institute of Technology.

  • Michael Kalinowski

    Michael Kalinowski

    Executive General Manager - VIC, TAS & NZ
    Michael has more than 30 years’ construction experience in Hong Kong, the United Kingdom and Australia delivering infrastructure projects for major contractors.
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    Having worked on various major transport projects, including Sydney’s M5 East and Melbourne’s West Gate Freeway, CityLink, including the Bolte Bridge and Tullamarine Freeway widening, and Tullamarine Calder Interchange, he also held executive management positions with Lendlease engineering. Prior to joining CPB Contractors in 2020 he was the Project Director for the Melbourne Metro Public Private Partnership. His academic qualifications include a Master of Engineering (Geotechnical) and a Bachelor of Engineering (Civil).
  • Craig Nuttall

    Craig Nuttall

    Executive General Manager - QLD & PNG, WA & SA
    Craig has over 20 years’ experience delivering a wide variety of projects in the Australian and UK construction industries.
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    Craig’s project management and technical skills have been used to successfully deliver critical infrastructure for clients in both the private and public sectors. He has successfully led large teams across multiple projects. 

    His previous appointment with CPB Contractors was as General Manager – VIC, SA and TAS.

  • Camillo Masci

    Executive General Manager - Building
    Camillo Masci has worked in the Australian building industry for more than 30 years.
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    Camillo’s expertise in end-to-end project delivery is extensive and includes the development of innovative and cost-effective design and construction methodologies, value-add engineering solutions, and rigorous safety and subcontractor management. As well as national building capabilities, Camillo is responsible for Defence projects and CPB Contractors’ subsidiary, Broad Construction.

    Camillo has a Bachelor of Applied Science, Construction Management from the Queensland University of Technology.

  • Terry Sleiman

    Executive Project Director
    Terry has more than 25 years’ leadership experience and is recognised as one of Australia’s most successful project directors for large, complex transport infrastructure. He joined CPB Contractors in January 2022, with a track record that includes leading the Sydney Metro TSE and TSC tunnelling projects and as construction director on the Brisbane Airport Link and Northern Busway project.
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    Terry holds a Bachelor of Engineering from the University of Technology Sydney.

  • Colin Carrigan

    Colin Carrigan

    Chief Financial Officer
    Mr Carrigan has strong experience leading finance teams across construction, energy, industrial and resources sectors over more than 20 years. 
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    Before being appointed CFO of CPB Contractors in November 2019, he was the company’s General Manager Finance. He has been with the CIMIC Group since 2015, having begun as Group Financial Controller with UGL. Mr Carrigan has also held senior positions with Tenix Group and AJ Lucas Group and commenced his career with PricewaterhouseCoopers.
  • Stuart McKenzie

    Stuart McKenzie

    Executive General Manager - Pre-Contracts & Risk
    Working in the Australian construction industry for more than 20 years, Stuart has extensive leadership experience in major civil construction companies, specialising in commercial, legal and project management.
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    Joining CPB Contractors in 2012 as Deputy General Counsel, Stuart supports our company by identifying and capitalising on work and project opportunities, and ensuring risks have been properly identified and assessed. This includes detailed assessments of work-winning priorities and a disciplined approach to bid and tender management and project reviews. Stuart holds both a civil engineering degree and a law degree.
  • Natasha Adamsas

    Natasha Adamsas

    General Manager - Corporate Affairs & Communications
    Natasha has worked in corporate communications, marketing and public relations for more than 20 years, with a focus on digital, client engagement, advocacy and reputation management programs across varied industries including construction, manufacturing, banking and insurance.
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    Natasha joined CPB Contractors in 2018, before being appointed to the Executive Leadership Team in January 2022. She holds a bachelor of Design Computing from the University of Sydney.
  • Graeme Silvester

    Graeme Silvester

    General Manager - Safety, Health, Environment & Quality
    Graeme has more than 30 years’ experience as a senior safety, health and environment professional both in Australia and internationally. He applies this expertise in delivering CPB Contractors' Safe Work Strategy which emphasises that keeping people safe is an absolute priority for the company.
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    Graeme has held senior functional leadership roles in other complex industries including offshore oil and gas, rail, mining and resources, electricity distribution and building. He is Fellow of the Australian Institute of Health and Safety.
  • JP Wallace

    Jean-Paul Wallace

    General Counsel
    Jean-Paul has a strong track record in providing key legal advice and support as part of corporate leadership teams, including more than 10 years as a General Counsel.
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    Jean-Paul leads a team delivering services including legal risk management, tenders and general commercial contract reviews. He also leads the company secretary function relating to the company’s statutory requirements. Jean-Paul holds a Bachelor of Laws (LLB) and Bachelor of Arts, as well as a Graduate Diploma in Corporate Governance from the Governance Institute of Australia.
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