He acted as the lead negotiator of the EU-Lebanon Association Agreement from 1996 to 2000 and at the same time, held posts as president of the Commission for the Development of Banking Technology and IT (COBIT) and became the minister of economy and trade (1998–2000) in Lebanon.

He acted as the chief economist of the Dubai International Financial Centre[5] and was also the executive director of the Hawkamah Institute for Corporate Governance.

Saidi designed and set-up DIFCSTAT,[8] a secure, interactive, on-line, web-based, registration, reporting and statistical system for DIFC entities.

He became an Accomplished Executive for Boardroom Metrics Arabia, which is a platform hub, specializing in talent and cross-referrals for independent consulting.

[13] In 2012, he was named among the 50 most influential Arabs in the World by The Middle East magazine, for the fourth consecutive year.

He has written a number of books and numerous publications addressing macroeconomic, capital market development and international economic issues in Lebanon and the Middle East region.