Dan C. Purdy, BSc, FSSocDip, FCSFS, D-ABFDE, majored in mathematics and physics at the University of British Columbia and, in 1969, joined the RCMP, completing a two-year training program in forensic document examination. Mr. Purdy joined the Canadian Society of Forensic Science in 1971 and served terms as a chairperson, director, and society treasurer. He transferred to the RCMP’s Ottawa laboratory in 1979 where he became head of the RCMP’s Document Operational Support Unit and Ottawa Document Section. He received a certificate of qualification in forensic document examination from the American Board of Forensic Document Examiners in 1980 and served as its president from 1993 to 1995. In 1989, Mr. Purdy was appointed the RCMP’s chief scientist of Document Services. In 1999, Mr. Purdy commenced work in the private sector. He is a member of the American Society of Questioned Document Examiners (serving as president from 2004 to 2006), the American Academy of Forensic Science, and a fellow of both the Chartered Society of Forensic Science and the CSFS. In 2012, Mr. Purdy was presented with the Albert S. Osborn Award of Excellence by the American Society of Questioned Document Examiners. Mr. Purdy has written over thirty scientific papers; examined over 4,500 cases; and testified as an expert witness in British Columbia, Alberta, Manitoba, Ontario, Quebec, Newfoundland & Labrador, the Yukon Territory, Nunavut, Bermuda, the United States, and Hong Kong. In 2015, he received the American Academy of Forensic Science’s Award of Merit.