The people behind the principle.

Yvette Simpson has spent more than two decades supporting senior executives, Boards and leadership teams across corporate, government and not-for-profit organisations. Throughout her career she has worked alongside CEOs, Executive Teams and Directors, providing high-level executive assistance, governance support, operational coordination and strategic business administration. Her experience spans everything from complex diary and travel management through to Board administration, company secretariat support, project coordination and business operations.

After years of seeing growing businesses struggle under the weight of administration, Yvette founded The Y Principle to give organisations access to experienced executive support without the commitment of a full-time employee. She believes the best working relationships are built on trust, consistency and genuine partnership, becoming an extension of a client's business rather than simply another outsourced service.

For Yvette, executive support has never been about completing tasks. It's about understanding how leaders work, anticipating what they need before they ask, protecting their time and helping them make better decisions. Great executive support creates space for leaders to focus on strategy, growth and the work only they can do.

Cathrine is an accomplished administrative professional with more than 15 years of experience across not for profits, digital and media agencies, startups and ASX listed companies.

Cathrine's experience spans the administrative spectrum, including executive assistance, office management, events management, workplace experience and HR coordination.

Cathrine is passionate about creating and maintaining an inclusive and positive company culture through the implementation of thoughtful and creative activities for staff engagement and cultural celebrations. She is also highly experienced in creating onboarding playbooks, introducing recognition programs and implementing company policies and procedures to create an overall people focused workplace.

A highly efficient and thought driven team player, Cathrine has been part of The Y Principle since August 2023, supporting clients with event management, travel bookings, diary management and general executive business support.

Brooke is a seasoned Governance, Risk and Compliance professional with over 20 years of experience, including an extensive background in the financial services sector. She possesses a deep expertise in governance frameworks, regulatory change and risk management, with a proven track record of assessing complex matters to drive effective organisational outcomes.

Her technical proficiency extends to executive-level reporting, governance assurance, and the seamless coordination of board-level committees and forums.

Known as a trusted advisor, Brooke excels at partnering with senior leaders and cross-functional teams to navigate intricate regulatory landscapes. She is recognised for her collaborative approach, high degree of integrity, and ability to translate policy into practical, real-world applications. Committed to excellence and discretion, she consistently delivers high-quality results that support long-term organisational success.

Sally is a highly experienced administrative professional with over 20 years of experience across administration, working across industries including disability, automotive, childcare, property development, tourism and insurance.

Sally's experience spans the administrative spectrum, including executive support, office coordination, budget and event management, and stakeholder communication. She is highly organised and dependable, with a strong appreciation for accuracy, well-presented information and clear, professional communication.

A values-driven professional, Sally thrives in environments built on trust, kindness and strong ethical principles. She approaches challenges with creativity and a willingness to explore innovative solutions, and takes pride in creating structured, supportive environments that allow executives and teams to flourish.

Nerida is a seasoned Executive Assistant and Operations professional with over 15 years of experience supporting C-Suite executives across a diverse range of industries.

Nerida brings extensive experience partnering with Founders, C-Suite executives and Boards across industries including investment management, financial services, resources, management consulting, oil and gas, and the carbon and clean energy sector. Known for her discretion, high emotional intelligence and proactive approach, Nerida is a trusted confidant and right-hand support to the executives she works with.

Nerida is dedicated to building strong, trusted working relationships and takes pride in enabling the executives and teams she supports to focus on what matters most.

Natalie is a dedicated executive assistant and operations professional with more than 12 years of experience across commercial property, project management and professional services. Her experience spans the full administrative spectrum, including executive assistance, head of administration, operations and project coordination.

Natalie is passionate about bringing order to complexity, helping business owners and leadership teams operate with clarity and confidence through well-structured systems, streamlined processes and reliable behind-the-scenes support. She is highly experienced in document management, financial administration and implementing the tools and procedures that keep businesses running smoothly.

A calm, solutions-focused operator, Natalie provides remote executive assistance and operations support, helping businesses and consultants with everything from diary and inbox management to process documentation, invoicing and financial administration, and operational project support.