Create value
Simplify complexity
Strengthen collaboration
Diffey Consulting helps senior leaders, boards and organisations turn complex challenges into clear strategy, trusted partnerships, good governance and practical outcomes. Advisory led by Lea Diffey.
Clear thinking. Trusted facilitation. Practical pathways.
Lea brings a considered, structured method to complex work - so leaders always know where they are, where they are heading and what happens next. Every engagement is different, so the way Lea works follows a consistent path: understanding the real challenge, map the system around it, align the right people, and shape a strategy that turns into practical, achievable impact.
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Turn complex ideas and policy priorities into clear strategies, practical plans and innovation capability that engage and deliver.
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Bring multiple parties together with shared purpose, structure and trust — turning complex relationships into productive partnerships.
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Support boards and leadership teams with decision-making frameworks, accountability structures and performance alignment.
Trusted by leaders working across sectors and systems
Who Lea works with
Lea works with organisations where progress depends on clarity, collaboration and confident decision making.
Companies and organisations
Industry and cross-sector partnerships
Boards and advisory groups
Not-for-profits and purpose-led organisations
Universities and research institutions
Government departments and agencies
Why Clients Choose
Diffey Consulting
Lea Diffey brings a rare combination of senior public sector leadership, governance discipline, innovation strategy and cross-sector partnership experience.
Over a career spanning more than 15 years in senior government roles, Lea has led complex programs, shaped policy and reform, and built the kinds of partnerships that move organisations from ambition to delivery. She now works as an independent advisor to senior leaders, boards and organisations navigating complexity, collaboration and change.
Her approach is calm, structured and practical. Lea is trusted by companies, industry, university, government and board leaders for her strategic insight, her ability to align people around a shared purpose, and her focus on outcomes that hold up over time.
