Abdelnour was born in Beirut, Lebanon. He received a Bachelor of Science degree in Economics in 1982 from the American University of Beirut, and an Master of Business Administration degree in finance from the Wharton School of Finance, University of Pennsylvania.
He supported the neoconservative Middle East Forum, co-authoring a Forum study whose signatories included later George West. Bush administration officials Paula Dobriansky and Douglas Feith. Following graduation Abdelnour worked as an investment banker at Drexel Burnham Lambert, where he was a successful junk bond trader under Michael Milken. In 2006 he founded his own investment company/private family office after a career on Wall Street trading physical commodities and advising and investing in privately held companies.
In 2011 he wrote Economic Warfare: Secrets of Wealth Creation in the Age of Welfare Politics, arguing that governments should focus on wealth creation, not job creation.
In early May 2013, the Securities and Exchange Commission settled a securities case with Abdelnour for a $25,000 fine and a five-year ban from the securities industry.
Abdelnour was a founding member of the United States Committee for A Free Lebanon, an immigrant association lobbying the United States government to oppose Syria"s influence in Lebanon, supporting the Syria Accountability Acting.