Diane has worked closely with David Williams since 1988 and was part of Chessell Williams since its formation in 1997.

Diane completed a BA Degree in Fine Arts and worked as a Legal Assistant before undertaking a legal executive course at the Royal Melbourne Institute of Technology, graduating in 1994. Diane is a Fellow of the Institute of Legal Executives.

Diane specialises in conveyancing, mortgage and probate work, and advises in relation to retirement villages, subdivisions, and security documentation. She is a member of the Law Institute of Victoria's Property & Environmental Law Section.