Edmond Auguste Mulet Lesieur (born 13 March 1951) is a Guatemalan diplomat, lawyer and notary public.

He was appointed Head of the independent three-member panel to lead the Organisation for the Prohibition of Chemical Weapons (OPCW)-United Nations Joint Investigative Mechanism on 27 April 2017.

Immediately prior to taking up his post, he was United Nations Assistant Secretary-General for Peacekeeping Operations.

During the 1980s, Mulet was accused of belonging to an illegal adoption ring that facilitated the departure of babies from the country, posing as tourists.

In 1993, he was appointed Ambassador to the United States, a post from which he resigned following the self-coup of President Jorge Serrano Elías in 1993.

During those years, he was a regular lecturer at think-tanks, universities and colleges across the Americas, and at the Foreign Service Institute in Washington, D.C.

Upon his return to Guatemala in 1996, he was elected general secretary of the Unión del Centro Nacional party.