Our leaders

  • Diego Zumbaquero

    Diego Zumaquero

    Managing Director
    Diego is an experienced executive leader with more than 25 years’ international experience in construction contracting and services sector.
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    Before becoming Managing Director at CPB Contractors, he was Chief Operating Officer for Construction with the CIMIC Group. Diego’s previous positions included President of Dragados Canada, Subsidiaries, Civil Works and Buildings Managing Director of Dragados Spain, and Managing Director of Clece. Diego has a strong commitment to safety and health, the support and development of people, and high-quality operational performance and project delivery.

  • Roberto

    Roberto Gallardo

    Executive General Manager - Vic, WA, NZ & Broad
    Roberto has worked in the infrastructure sector for over 25 years and has been the Managing Director of three infrastructure companies in Europe, America and Asia Pacific, with specialist expertise across diverse contractual and risk transfer models.
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    Roberto, formerly Deputy Managing Director of CIMIC Group company, Pacific Partnerships, is responsible for CPB Contractors' construction operations in Western Australia and the Northern Territory, and for our subsidiary Broad. Roberto has a MSc Urban Planning (Master in Urban Development and Land Organisation) and a Bsc Civil Engineering (Bachelor in Civil Engineering).

  • Don Johnson

    Don Johnson

    Executive General Manager - NSW, Qld, Major Projects & Tunnelling 
    Don has more than 30 years’ experience in the Australian construction industry, having held senior executive construction and engineering roles on some of the country’s largest infrastructure projects across all major sectors, leading both the tendering and execution phases. 
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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 built his reputation as an innovative leader with an open, communicative style and risk-based approach. Don holds a BE Civil Engineering (Hons) from the Queensland Institute of Technology.
  • Andrew Nolan

    Andrew Nolan

    Executive General Manager - People & Culture
    Andrew has a strong track record of aligning business strategies with people engagement, safety and sustainability.
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    Andrew is focused on fostering and celebrating our people’s skills, efforts and commitment, and is leading our work to ensure our people are at the heart of our competitive advantage. Before joining CPB Contractors, Andrew spent more than a decade as a senior leader in major civil construction organisations, including CIMIC Group. He holds a Bachelor of Laws (Hons) and a Bachelor of Social Science.
  • 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.
  • 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 five 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.
  • 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.
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