William Buck Executive and Leadership Team

July, 2026

Leadership Overview

William Buck has 5 executives leading key functions including finance, operations, and people management.

Dedicated to delivering exceptional accounting and tax services, William Buck drives client success through expert financial guidance and strategic operational leadership, solidifying its market presence.

Leadership Roles at William Buck

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

    Sarah Young, the Chief Financial Officer at William Buck, directs the company's financial strategy and fiscal operations. Overseeing all financial planning, risk management, and investment activities, Sarah Young ensures the financial health and stability of the organization. This leadership position involves managing accounting functions, optimizing capital allocation, and driving profitability through rigorous financial analysis. The Chief Financial Officer's responsibilities extend to developing financial models that support long-term growth objectives and reporting financial performance to stakeholders. By maintaining robust internal controls and fostering strong relationships with financial institutions, the Chief Financial Officer safeguards company assets and enhances shareholder value. Sarah Young's strategic insights guide the firm's financial direction, ensuring alignment with its mission of providing expert accounting and tax services across Australia.
    Sarah Young

    Rhett Schlaphoff - Undergraduate, Chief Financial Officer Advisory

    Rhett Schlaphoff, the Undergraduate, Chief Financial Officer Advisory at William Buck, supports critical financial advisory functions. This role involves assisting senior finance leaders in developing and implementing strategic financial plans for clients. Rhett Schlaphoff contributes to financial analysis, market research, and the preparation of advisory reports, directly impacting client service delivery. The position requires a keen understanding of accounting principles and tax regulations to provide accurate and actionable advice. By collaborating with the Chief Financial Officer and other finance professionals, Rhett Schlaphoff helps to identify opportunities for financial optimization and risk mitigation for the firm's clientele. This foundational experience within the Chief Financial Officer Advisory team prepares Rhett Schlaphoff to contribute to William Buck's reputation for excellence in financial services.

    Hugh Bastiaan - Group Chief Operating Officer

    Hugh Bastiaan, the Group Chief Operating Officer at William Buck, orchestrates the firm's operational efficiency and service delivery across all locations. Overseeing day-to-day business activities, Hugh Bastiaan ensures seamless execution of accounting and tax services, driving operational excellence. This critical role involves managing resources, optimizing workflows, and implementing best practices to enhance productivity and client satisfaction. The Group Chief Operating Officer's focus extends to strategic planning for operational scaling and the integration of new technologies to support business growth. By fostering a culture of continuous improvement, Hugh Bastiaan ensures that William Buck maintains its high standards of service and responsiveness. The Group Chief Operating Officer's leadership is pivotal in translating strategic objectives into tangible operational outcomes, reinforcing the firm's commitment to client success.

    Amanda Anderson - Partner & Chief Operating Officer

    Amanda Anderson, the Partner & Chief Operating Officer at William Buck, drives operational strategy and service excellence within the partnership structure. This dual role involves overseeing the firm's operational functions while contributing to strategic partnership decisions. Amanda Anderson focuses on enhancing service delivery models, ensuring efficient resource allocation, and maintaining the highest standards of client service. The Chief Operating Officer responsibilities include managing key operational projects and implementing initiatives that support the firm's growth and market position. By collaborating with partners and operational teams, Amanda Anderson ensures that William Buck consistently meets and exceeds client expectations in accounting and tax advisory services. This leadership ensures operational alignment with the firm's overall business objectives and commitment to client success.

    Maider Birett - Chief People Officer

    Maider Birett, the Chief People Officer at William Buck, leads the strategic direction for human capital management and organizational development. Overseeing all aspects of employee relations, talent acquisition, and retention, Maider Birett cultivates a high-performance culture aligned with the firm's values. This executive position involves developing and implementing HR policies, programs, and initiatives that support employee growth and engagement. The Chief People Officer's responsibilities include fostering a diverse and inclusive workplace, managing compensation and benefits, and ensuring compliance with labor laws. By championing employee well-being and professional development, Maider Birett plays a crucial role in attracting and retaining top talent, essential for delivering expert accounting and tax services. The Chief People Officer's strategic focus on people empowers the William Buck team to achieve organizational goals.
    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 Hugh Bastiaan (Group 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), Hugh Bastiaan (Group 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, Group Chief Operating Officer, Partner & Chief Operating Officer, Chief People Officer.