Christian is a leading academic and thought-leader in the field of coaching, as well as a practising executive coach. Regarded as an international authority in the field, Christian regularly speaks at conferences, facilitates training, and consults in the UK, Europe, the Middle East and Australia.

Particularly passionate about the application of coaching and positive psychology in education, Christian is the author of An Introduction to Coaching Skills: A Practical Guide (Sage, 2014) and the editor of Coaching in Education: Getting Better Results for Students, Educators and Parents (Karnac, 2012) and Coaching in Professional Contexts (Sage, 2016). He holds the role of Editor in Chief of Coaching: An International Journal of Theory, Research and Practice, a leading, peer-reviewed academic journal. He also recently co-wrote with John Campbell The Leader's Guide to Coaching in Schools: Creating Conditions for Effective Learning (Corwin, 2017).