Colonel General Ihor Petrovych Smeshko (Ukrainian: Ігор Петрович Смешко, born 17 August 1955) served as the head of the Security Service of Ukraine (SBU) from 2003 to 2005, where he supported the opposition during the Orange Revolution.

[5] Born in 1955 in Khrystynivka, Cherkasy Region, Smeshko has made a career as a professional soldier-scholar.

In 1995, Smeshko was awarded a general's star and recalled to Ukraine to lead the president's committee on intelligence, which he did for 3 years.

In 1997, Smeshko was appointed Chief Directorate of Intelligence of the Ministry of Defence of Ukraine where he uncovered "massive fraud" in weapons end-user certificate production indicative of arms trafficking at the SBU, then headed by Leonid Derkach.

He immediately set into action with a plan to preserve documents, replace top management and reorganize the agency with new pay scales and a mission focused away from KGB style secret political police.

[7] A parliamentary commission investigating in October 2004 confirmed that Smeshko dined with Viktor Yushchenko on the night of September 5, 2004, where he may have been poisoned.

Yushchenko claims to have fallen ill about 3 hours after the dinner and sought medical treatment the following day.