Dr. Marwan Jamil Issa Muasher (born 1956) is a Jordanian diplomat and politician. Born in Amman, Jordan, to a Christian family, he hails from the Jordanian city of Salt. Muasher earned a bachelor’s degree in electrical engineering in 1977, followed by a master’s degree (1978) and a doctorate (1981) in computer engineering. He began his career as a journalist for the English-language newspaper *The Jordan Times*. Subsequently, he worked at the Ministry of Planning (1985–1990) and later served as a media advisor to the Prime Minister.

Muasher served as the official spokesperson for the Jordanian delegation during the peace negotiations from 1991 to 1994. He then served as Jordan’s ambassador to Israel (1995–1996) and subsequently as ambassador to the United States (1997–2002), playing a prominent role in finalizing the Jordan-US Free Trade Agreement.

Muasher was appointed Minister of Information in 1996. He later served as Minister of Foreign Affairs (2002–2004) in the government of Ali Abu Al-Ragheb, and again as Foreign Minister in 2003 in the government of Faisal Al-Fayez. In 2004, following a cabinet reshuffle in the Faisal Al-Fayez government, he was appointed Deputy Prime Minister and Minister of State for Prime Ministry Affairs and Government Performance Monitoring. He subsequently served as Deputy Prime Minister from 2004 to 2005 in the government of Dr. Adnan Badran. Dr. Muasher was appointed as a member of the Jordanian Senate, serving until March 16, 2007. He previously held the position of Vice President for External Affairs at the World Bank and currently serves as Vice President for Studies at the Carnegie Endowment for International Peace. He is the author of *The Arab Center: The Promise of Moderation* and *The Arab Moderate Way*.

He currently writes for various newspapers and news websites on economic and political conditions in Jordan and the Middle East.