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Who is Peter F. Gallagher?

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Peter F. Gallagher is a Top 4 Global Leadership Authority, the world’s #1 Change Leadership Thought Leader, and a 20‑book author who advises boards and C‑suites worldwide. He is the founder and architect of Saeculum Leadership® — a generational school of thought reframing leadership as a civic, moral, and evolutionary responsibility.

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Leadership Philosophy

Peter’s philosophy is simple yet demanding:

  • Leadership is generational stewardship.

  • Management preserves the present; leadership builds the future.

  • Leaders shape possibility, not comfort.

  • Leadership is the human expression of our evolutionary arc — the responsibility to create, protect, and transmit what matters.

His mission is to redefine leadership as the act of influencing people through vision to embrace change and deliver continuous improvement.

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Speaking & Thought Leadership
Peter delivers high‑impact keynotes on Saeculum Leadership® generational stewardship, and long‑arc transformation. His work equips leaders to think beyond the present, align their organisations, and lead change with clarity, discipline, and purpose.

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Author & Canon Builder 

Peter is the author of 20 books across leadership, change, stewardship, and organisational transformation. His works include:
 

  • Saeculum Leadership® Canon

  • Saeculum Leadership® Body of Knowledge (SLBoK)

  • Leadership of Change® Series

  • Change Management Body of Knowledge (CMBoK)


His frameworks and simulations are used globally to build leadership capability and organisational readiness.

"Change Waits for No Leader.
All leadership is about change and improvement. If you are not leading these, you are a manager!"

For more than 40 years, Peter has worked in over 40 countries, helping leaders steward transformation, align their organisations, and shape the conditions for responsible, measurable, and sustainable change.

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Recognition and Rewards:

Ranked #4 in the Global Gurus Top 30 Leadership Gurus (2026) by Global Gurus.

Ranked #1 Global Thought Leader in Change Management by Thinkers360 (2020–2025).

Ranked #1 Global Thought Leader in Business Strategy by Thinkers360 (2023–2025).

Ranked #7 Global Thought Leader in Leadership by Thinkers360 (live ranking).

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Former Board Member:

• Association of Change Management Professionals® (ACMP®) Global

• Association of Change Management Professionals® (ACMP®) UK​

Professional Qualifications:
Robert Gordon University, UK- MBA (Distinction)

Association of Change Management Professionals (ACMP) - (CCMP™)

Project Management Institute (PMI): Project (PMP®),

Project Management Institute (PMI): Programme (PgMP®)

Project Management Institute (PMI): Risk (PMI-RMP®) Management Professional

American Society for Quality (ASQ) - Certified Manager of Quality (CMQ/OE)

American Society for Quality (ASQ) - Certified Six Sigma Black Belt (CSS BB)

Six Sigma Academy/Shell International: Lean Six Sigma Master Black Belt (LSS MBB)

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