Tero Varjoranta (born January 15, 1957) is a Finnish diplomat who started working as Deputy Director General of the IAEA and Head of the agency's Inspection and Supervision Department.

[6] Between 2010 and 2012, Varjoranta served as a Director in the IAEA Department of Nuclear Energy, having previously worked as Division Manager in the International Science and Technology Centre in Moscow.

[5] As Director of IAEA inspectors, Tero Varjoranta traveled to Iran in recent years on several occasions.

Two months after the JCPOA was signed, he accompanied Yukiya Amano Director General of IAEA during his visit to Parchin Area in Tehran in September 2015.

Reuters News Agency wrote: “The departure of Tero Varjoranta comes at a sensitive time, three days after the United States announced it was quitting world powers’ nuclear accord with Iran.” [7] Following the resignation of Tero Varjoranta on May 11, 2018, the IAEA Director General assigned Massimo Aparo temporary director and supervisor of the department for monitoring Iran as his successor.