Roberts-Smith held numerous prominent community positions. He was a former chairman of the Citizens' Advice Bureau of WA (Inc), chairman of the State Advisory Panel for Translators and Interpreters, and the president of the Civil Rehabilitation Council of WA (Inc) from 1980 to 1982. He chaired the State Government Committee of Review into the Administration of Criminal Justice in Queensland in 1993, which reported in September that year. He was counsel to the WA Parliamentary Committee on Delegated Legislation from 1989 to 1998. In 1989, he was appointed deputy president, and in 2000, president of the Equal Opportunity Commission of Western Australia.