William Buck Executive and Leadership Team

August, 2026

Leadership Overview

William Buck has 5 executives leading key functions including financial oversight, advisory services, operational management, and human capital development.

Committed to excellence in accounting and tax services, William Buck delivers comprehensive financial solutions while maintaining a legacy of professional integrity and client-focused innovation across the Australian market.

Leadership Roles at William Buck

  • Chief Financial Officer - Sarah Young
  • Undergraduate, Chief Financial Officer Advisory - Rhett Schlaphoff
  • Partner & Chief Operating Officer - Amanda Anderson
  • Group Chief Operating Officer - Hugh Bastiaan
  • Chief People Officer - Maider Birett
  • Sarah Young - Chief Financial Officer

    Sarah Young, the Chief Financial Officer at William Buck, directs all fiscal strategy and financial reporting requirements. Overseeing the firm's internal accounting controls, the Chief Financial Officer ensures compliance with national tax regulations while managing capital allocation across the New South Wales headquarters. This leadership role involves analyzing complex financial data to support long-term growth objectives and firm-wide profitability. By optimizing internal audit processes, Sarah Young directly impacts the financial health of the organization. Furthermore, the Chief Financial Officer collaborates with the board to refine investment strategies and risk management frameworks. Through rigorous oversight of fiscal operations, Young secures the economic stability necessary for delivering high-quality accounting services to a diverse client base. This position remains central to maintaining the firm's reputation for accuracy and reliability in the competitive professional services landscape.
    Sarah Young

    Rhett Schlaphoff - Undergraduate, Chief Financial Officer Advisory

    Rhett Schlaphoff, the Undergraduate, Chief Financial Officer Advisory at William Buck, supports the delivery of specialized financial consulting services to corporate clients. Assisting with complex tax planning and financial modeling, the Undergraduate, Chief Financial Officer Advisory contributes to the development of strategic insights that drive client success. This role involves conducting detailed market research and preparing technical documentation for senior leadership review. By synthesizing financial data, Rhett Schlaphoff assists in the formulation of actionable recommendations for business optimization. The Undergraduate, Chief Financial Officer Advisory works closely with senior partners to address specific client needs within the accounting and tax sector. Through meticulous attention to detail and analytical rigor, Schlaphoff enhances the firm's advisory capabilities. This position focuses on bridging the gap between raw financial information and strategic decision-making, ensuring clients receive precise guidance for navigating the evolving Australian economic environment.

    Amanda Anderson - Partner & Chief Operating Officer

    Amanda Anderson, the Partner & Chief Operating Officer at William Buck, manages the daily operational workflows and internal service delivery standards. Overseeing the integration of accounting technology and administrative efficiency, the Partner & Chief Operating Officer ensures that service teams maintain high productivity levels. This leadership role involves streamlining internal processes to improve client engagement and project turnaround times. By fostering a culture of operational excellence, Amanda Anderson directly impacts the firm's ability to scale service offerings across the region. The Partner & Chief Operating Officer coordinates with other executive leaders to align operational capacity with business development goals. Through the implementation of robust management systems, Anderson drives continuous improvement in service quality. This position remains vital for maintaining the firm's competitive edge, ensuring that all accounting and tax operations function with maximum precision and client-centric focus.

    Hugh Bastiaan - Group Chief Operating Officer

    Hugh Bastiaan, the Group Chief Operating Officer at William Buck, architects the overarching operational strategy for the entire organization. Directing large-scale initiatives to enhance service delivery, the Group Chief Operating Officer ensures that regional operations remain consistent with the firm's long-term vision. This leadership role involves managing cross-functional teams to optimize resource allocation and improve overall business performance. By identifying opportunities for structural growth, Hugh Bastiaan directly impacts the firm's market position in the accounting and tax industry. The Group Chief Operating Officer collaborates with the executive team to execute strategic plans that expand the firm's footprint across Australia. Through the oversight of complex operational projects, Bastiaan maintains high standards of service excellence. This position focuses on driving efficiency and innovation, ensuring that the organization remains agile and responsive to the changing needs of the professional services market.

    Maider Birett - Chief People Officer

    Maider Birett, the Chief People Officer at William Buck, leads all human capital strategies and talent development initiatives. Overseeing recruitment, retention, and professional training programs, the Chief People Officer ensures that the firm attracts top-tier accounting talent. This leadership role involves cultivating an inclusive workplace culture that supports the firm's mission of providing expert tax and accounting services. By implementing performance management frameworks, Maider Birett directly impacts employee engagement and organizational productivity. The Chief People Officer works closely with department heads to align workforce capabilities with the firm's strategic objectives. Through the development of comprehensive wellness and career progression plans, Birett fosters a high-performance environment. This position remains essential for building a resilient and skilled workforce capable of meeting the complex demands of the professional services sector, ultimately driving the firm's long-term success through its people.
    Maider Birett

    Frequently Asked Questions Regarding William Buck Top Executives and Leadership Team

    Who leads William Buck?
    William Buck is led by Sarah Young (Chief Financial Officer), along with executives such as Rhett Schlaphoff (Undergraduate, Chief Financial Officer Advisory) and Amanda Anderson (Partner & Chief Operating Officer).
    Who is part of William Buck’s executive team?
    The executive team of William Buck includes leaders such as Sarah Young (Chief Financial Officer), Rhett Schlaphoff (Undergraduate, Chief Financial Officer Advisory), Amanda Anderson (Partner & Chief Operating Officer) and other senior executives.
    How many executives does William Buck have?
    William Buck has 5 executives leading key business areas.
    What roles are included in William Buck’s leadership team?
    The leadership team of William Buck includes roles such as Chief Financial Officer, Undergraduate, Chief Financial Officer Advisory, Partner & Chief Operating Officer, Group Chief Operating Officer, Chief People Officer.