David practised as a solicitor between 1980 and 1984 before being admitted to the Bar. He is admitted to the NSW bar, QLD bar, Victorian bar, WA bar, ACT bar and NT bar.

David practises in the following areas:

• Appellate
• Commercial Law
• Common Law
• Criminal Law
• Defamation
• Dust Diseases
• Equity
• Inquests/Inquiries
• Insurance Law
• Professional Negligence

David Campbell also has Chambers in Sydney at Garfield Barwick Chambers and in Canberra at Key Chambers.