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Our Directors and Expertise

Our core team has deep international, corporate and big 4 consulting experience in designing and delivering organisation change and transformation.

organisational change management keynote speaker Peter F Gallagher,Peter F Gallagher Change Management Expert,,, The Leadership of Change – Volume 1 - Fables, the change explosion, The Leadership of Change – Volume 2 - Change Pocket Guide, the Leadership of Change – Volume 3 Leadership Solutions, change, The Leadership of Change – Volume 1-3, Change Leadership, Peter F Gallagher  Author, Peter F Gallagher Speaker, Enabling the leadership of change
  • Peter leads a2B Advisory Consulting Ltd in both London and Edinburgh

  • Peter is an organisational change management thought leader and expert

  • Peter has worked as a consultant and executive for over 30 years

  • Peter is the Author of the Leadership of Change® Volumes 1 - 7 & A - C

  • Peter is also a organisational change management keynote speaker


Peter is a Change Management Global Thought Leader, Expert, Guru, International Corporate Conference Speaker, Author x12, and C-level Change Leadership Coach.

Peter speaks on change management, change leadership and the benefits of change management gamification. He has a proven track record of complex change and project delivery in multi-disciplinary environments for the world’s largest and most successful organisations. He has Big Four external consulting experience, as well as internal and commercial consulting experience, working in over twenty-five countries over a thirty-year career. Companies he has worked for include: EY, Shell, NCR and Bombardier Aerospace and has held senior roles in industry and has boardroom experience as a NED. His clients include organisations such as ADNOC, Boeing, GE, Rolls Royce and Saudi Aramco.

As a speaker, Peter has presented strategic transformations leading practice to Government entities, CEO audiences globally and at professional membership conference. He has led large change management communications events (200+ employees) and developed change leadership alignment processes, change concepts, assessments, frameworks, models and tools.

Peter has an MBA (Distinction) from the Robert Gordon University. He is an American Society of Quality (ASQ) Certified Manager of Quality, a Certified Change Management Professional™ with the Association of Change Management Professionals (ACMP) and holds three certifications from the Project Management Institute (PMI). He is also a Lean Six Sigma Master Black Belt.. More about Peter.

Sarah L Gallagher

Sarah L Gallagher Change Management Consultant, a2B Consulting, Peter F Gallagher,

Sarah leads a2B Consulting Operations 

Resourcing and Client Relations

Most recently, Sarah has worked for PA Consulting in the UK after working in the Middle East for nearly five years. In Abu Dhabi, Sarah worked as an Account Manager for a major organisation that offered local partnership options for international businesses looking to enter the Middle East market with their products and services. Prior to this, Sarah worked as an internal Communications Consultant for Royal Dutch Shell, leading communications and community activities for two Gas Plants in Scotland. Sarah’s work experience includes regional development, energy, recruitment and education.


Sarah is a highly personable and efficient individual with broad international industry experience having worked for the world’s largest and most successful organisations in 10 plus countries. Working across many countries and cultures has allowed Sarah to develop strong interpersonal and communication skills. She is experienced and proficient in helping individuals and teams to cope with transitions, improvement and changes in their working lives. 

We welcome relationships with independent consultants, speakers, entrepreneurs, business schools and other consultancies. 

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