Rogelio Pfirter (born 25 August 1948) is an Argentine diplomat who served as Argentina's ambassador to the United Kingdom and to the Holy See.

[4] In 2002, Pfirter was unanimously elected the Director-General of the Organisation for the Prohibition of Chemical Weapons (OPCW) in The Hague, The Netherlands.

Pfirter’s tenure was praised as a time of consolidation and strengthening of the OPCW after the controversial departure of his predecessor José Bustani.

Pfirter gathered support for chemical weapons destruction and as a manager he succeeded in administering the Secretariat with zero nominal growth (ZNG) for four years in a row.

[5][6] Pfirter has received a number of international awards including Grand Cross of the Orden of Merit from Chile as well as Germany; Officier of the Legion of Honour from France and Commandeur of the Order of Orange-Nassau from the Netherlands.