Gerry O'Sullivan

 The Mediator's Toolkit - Formulating and Asking Questions for Successful Outcomes

 Training Programmes accompany the book. Click for details


Learn how to formulate and ask penetrating, paradigm-shifting questions for successful outcomes in any conflict.

Knowing how to formulate and ask incisive questions to get to the core of a conflict, challenge entrenched thinking, and shift perspectives are the main challenge for mediators and the key to successful conflict resolution.

The Mediator's Toolkit - Formulating and Asking Questions for Successful Outcomes employs the author's powerful "S Questions Model," to provide readers with the skills and tools to develop and ask strategic questions that result in successful outcomes in any context. The S Questions Model toolkit dives into four dimensions of successful questions for mediation: the subject matter dimension, the structure dimension, the information seeking dimension, and the shifting thinking dimension. The Model clearly explains:

This essential practical guide will radically sharpen, focus, and improve the questioning skills of qualified mediators, students, lecturers, trainers, and those using questions to challenge and effect change, in any context.

How to get a copy of The Mediator's Toolkit - Formulating and Asking Questions for Successful Outcomes

Available at all fine bookshops and online at Hodges & Figgis/Waterstones, The Book Depository and Amazon. Also available from the publishers New Society (

Published articles and reviews

Law Society Gazette, Ireland

Reviewed by Paul Pierse, Non-practising solicitor, Law Lecturer and Advanced Mediator with the Mediators' Institute of Ireland

ADRIC, Canadian Arbitration and Mediation journal

Published article by Gerry O’Sullivan

Review for CMP Solutions, U.K.

Reviewed by Dr. Lesley Allport.

Review by Ann Walsh, Mediators' Institute of Ireland advanced mediator

(Word document download)


“Gerry O’Sullivan has written a wonderful, well-researched, fascinating and practical toolkit for mediators that offers fresh new insights into how we can help our brains discover the questions that can transform conflicts into opportunities for resolution, learning and improved relationships. It is a terrific read, and one you will relish and be grateful for.”
Kenneth Cloke, mediator and author of The Dance of Opposites: Explorations in Mediation, Dialogue and Conflict Resolution Systems Design, California

The Mediator’s Toolkit: Formulating and Asking Questions for Successful Outcomes stands out among all teaching, self-help and learning books for mediators (professionals and wanna-bees), and their trainers, because it touches the part of a mediator’s art which most professionals only reach through sweat and blood during many mediations: the art of knowing how, when and why to ask the timely felicitous questions. This is revealed masterfully in the 'S Questions Model’ developed by the author Gerry O’Sullivan.”
Irena Vanenkova, international mediator, Moscow, Russia (former executive director of International Mediation Institute 2007-2018)

“At long last mediators have a valuable guide in the Mediator's Toolkit. The book dives deep into the psychology of information and emotion in conflict situations, illustrating in nuanced detail how well-crafted questions can lead conflicting parties to a wider understanding and therefore better outcomes. Highly recommended for facilitators and negotiators as well as mediators.”
Jennifer Beer (author of The Mediator's Handbook; Negotiation instructor at the Wharton School, University of Pennsylvania)

The Mediator's Toolkit - Formulating and Asking Questions for Successful Outcomes is a most welcome, useful, and sophisticated addition to the mediation and conflict coaching field. It synthesizes and explains the tools that are most relevant to questions in a user friendly, while intelligent fashion, with a view to practice. It will be a reference book for the serious hands-on professional for years to come.”
Dr. Antje Herrberg, CEO, Mediateur; Adjunct Professor in Peace Mediation, College of Europe; Former Member of the UN Standby Team for Mediation.

“Thoroughly enjoyable read as well as an invaluable resource for mediators in training and for experienced mediators, which will become an immediate ‘classic’.”
Treasa Kenny, Academic Programme Coordinator and Lecturer, Edward M. Kennedy Institute for Conflict Intervention, Maynooth University, Ireland.

“As a mediator and trainer this is a must have book. O’Sullivan’s examples and cases are reflective of a mediator’s reality making the toolkit a valuable book to buy in hardcover and keep on the desk.”
Juan Diaz-Prinz, Conflict Management Space, Berlin

The Mediator's Toolkit - Formulating and Asking Questions for Successful Outcomes is a rare thing indeed - a practical manual built on a solid foundation of knowledge and theory. Set out in an engaging, user friendly format, this book fills a crucial gap in mediation skills and practice. This book is essential reading for all students of conflict and mediation and should have a place in the briefcase of every practising mediator, no matter how experienced.”
Sabine Walsh, President, Mediators’ Institute of Ireland, Course Director, MA Conflict Management, St. Angela’s College Sligo

“Mediators have to work in the moment, exercising their intuition in a flash as to what to do next and how. This book will help to develop the internal base from which such intuitive insights emerge.”
Tony Allen, Mediator and Senior Consultant to CEDR

“It provides mediators with a clear conceptual framework to structure their questioning, clearly sets out the theoretical and psychological underpinnings to these techniques and then in some detail gives practical examples of how these questions may be used in mediation. While clearly written with mediators in mind, it is an invaluable resource to all those looking to resolve conflict.”
James South, Mediator and Managing Director, The Centre for Effective Dispute Resolution (CEDR), London

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