His main research interests lie in the area of professional interaction, with a particular focus on aspects of collaborative talk and identity. His publications include Qualitative Inquiry in TESOL (2003), Applying Conversation Analysis (edited with Paul Seedhouse, 2005), Language and Professional Identity (2006), Professional Encounters in TESOL: Discourses of Teachers in Teaching (edited with Sue Garton, 2008) and Research Methods for Applied Language Studies (with Steven Ross and Paul Seedhouse, 2011).