[1] He was an adviser to the late King Hassan II and member of the G-14 think-tank, which counted figures such as Taieb Fassi-Fihri and Driss Jettou.

[16][17] Returning to Morocco in 1992, Terrab was appointed Chargé de Mission to the Royal Cabinet of the late King Hassan II[18][19] before joining in 1995, as Secretary General, the Executive Secretariat of the Economic Summit for the Middle East and North Africa.

[3][20] From 1998, he led the National Agency for Telecommunications Regulation (ANRT), before joining The World Bank[21][22] as Lead Regulatory Specialist, where he directed the "Information for Development" (InfoDev) program for the support of entrepreneurs with strong growth in emerging economies.

The committee will deliver a report to King Mohammed VI on the impacts of the reform programs initiated in the Kingdom, across education, society, environment, infrastructure and the economy.

[30] In 1998, he received the Frederick C. Hennie III prize for his contribution to the MIT's Department of Electrical Engineering & Computer Science teaching programme.