Roger joined 4 New Square in 2008 after 10 years practice at 6 Pump Court and then Hailsham Chambers. He is ranked as one of the leading juniors in the field of costs law of all types and has been involved in many of the leading cases in the area. He has been described in the directories as "absolutely smashing", a ‘standout junior’ and “simply the best when it comes to costs law.” "He really is something else. The clear leader in the field now on the junior side. He knows the area so incredibly well but he's never overbearing with that knowledge. His approach is really helpful and his strength is when he's on his feet: he's a fantastic advocate." He “wins considerable market acclaim due to his broad knowledge base and restrained yet steely manner” with particular comment made of his ability to “bringing clarity and depth to the case” and his ability then to “integrate that into a team approach to get the best result’. He regularly appears in the Court of Appeal on important costs cases.

In addition, Roger also has a well-established practice in the fields of professional negligence (in particular clinical negligence), with a particular specialism in high value spinal injury cases. His particular skills and expertise also blend very well with his professional disciplinary work, particularly relating to solicitors. Roger also undertakes some general commercial contract law work.

Roger is particular attracted to complex technical issues and prides himself on his ability to work with his professional and lay clients to develop and then pursue a comprehensive strategy to deploy or respond to such issues at all levels.