Who we are

  • beech + willow emerged out of a passion for systems-thinking, the power of business for good, and making independent advice accessible to all.

    We wanted to show organisations there was a sustainable path to success that didn’t rely on cuts and efficiency measures but instead focused on building resilience through the systems at play.

    Our intent was to bring expertise without ego, and to facilitate emergent outcomes through clients recognising their blind spots and reconnecting with their core wisdom.

  • What do you do when your organisation hits that point of inflection or plateaus, but you don't quite know what to shift? You get help.

    We are a systems-led consultancy who exist to help leaders navigate complexity and learn to work with it, to unlock the path to successful transformation.

    Inspired by the wisdom of living systems and the principles of regenerative business, we utilise deep observation, coaching, co-design and iterative review to challenge blindspots, strengthen critical linkages and build resilient systems that empower your organisation to thrive. 

  • Listening deeply. Building capability. Compassionate conversations. Making ourselves redundant.

    We believe context is everything and each situation requires us to understand the unique stakeholders, environment, influences and drivers at play to develop an approach that will truly be effective.

    We think in nested ecosystems, meaning we take a transdisciplinary approach that deeply observes the current operating context, seeking to honour what has come before and co-create a future state that activates the organisation's highest potential.

Meet the team

Tammy Brien

Founder and CEO
MBA, GAICD

With decades of experience across public, private, and nonprofit sectors, Tammy has advised boards, C-suite executives, and leadership teams at ASX50 companies, global multinationals, government agencies, and social impact organisations.

She specialises in supporting boards and executive teams through periods of significant change, fostering the clarity and alignment needed for successful transformation. Tammy has developed deep expertise in strategy development, leadership and culture, sustainability, and governance frameworks for social impact. Her approach integrates living systems thinking and complexity science to help organisations navigate ambiguity and drive meaningful transformation.

Tammy's work focuses on helping leaders and boards understand their unique operating context, honour organisational legacy, and chart pragmatic pathways forward. Her interdisciplinary methodology emphasises stakeholder engagement, systems observation, and co-creation to unlock organisational potential and deliver sustainable outcomes.

Dani Christos

Co-Design and Engagement Lead
BSc., Grad Cert. Leadership

Dani partners with clients to deliver meaningful outcomes that address real societal challenges and create lasting positive change, bringing a rare blend of commercial rigor and values-driven purpose. With a career spanning Big 4 professional services, mining and higher education, she has built a reputation as an authentic change leader who delivers sustainable impact through genuine collaboration and trusted relationships.

Dani has expertise across strategy and mergers and acquisitions, honed over six years leading business integration and separation projects within Big 4 consulting and the mining sector. Her experience has equipped her with deep insight into organisational complexity and the critical importance of putting people at the center of transformation initiatives. Prior to this, Dani spent a number of years in the higher education sector working across research and student support services, where she developed a strong foundation in student-centered practice and harnessing the unique dynamics of mission-driven organisations.

She joined beech + willow to intentionally align her career with her personal values, focusing on driving systems change for purpose. Dani approaches every engagement with empathy and authenticity, ensuring that transformation initiatives enhance not only operational excellence but also the lived experiences of the people they serve.