The law firm of Collins & Thompson traces its origins to the firm of Diamond Vandersluis & Co. in Hornsby with David Thompson joining that firm in March 1974. The firm is located in Hornsby, Sydney, close to the courthouse and Hornsby Council and in the midst of the “Real Estate Precinct”. The practice is a well-established practice with six solicitors and consultants employed to provide a combination of law services such as Conveyance and Commercial law, Criminal and Traffic Law, Family Law and General Civil Litigation.