Richard Mattick advises and represents clients in connection with the resolution of disputes in a variety of fields, with particular emphasis on insurance and contractual disputes, as well as acting for clients in relation to export controls matters. Chambers UK (2018) notes "he is absolutely brilliant and understands the complexity and the fine lines of a policy. We get good solid responses and good support." In 2017, he is "the first man to talk to’" for insurance advice,” "he has a great manner about him, is very practical and also very client service-oriented." Legal 500 UK (2013-2014) describes him as a "pleasure to work with," “first rate lawyer, who fights his corner hard” and “very quick to respond.”