Effendi served as Executive Chairman of Sarawak Economic Development Corporation (SEDC) for 15 years from 1981 to 1995, where his numerous successes was recognized and he was awarded the Chief Secretary to the Government's Quality Award and the prestigious Malaysian Prime Minister's Quality Award in 1994. Appointed by Prime Minister
Mahathir Mohamad, he initiated the modernization and commercialization of agriculture when he was appointed the
Minister of Agriculture, thereby ensuring the long-term growth of the crucial sector in the country. He was then invited by former Prime Minister
Tun Abdullah Badawi to head up the Economic Planning Unit (EPU) as the
Minister in the Prime Minister's Department. During his tenure as the Minister of EPU from 2006 to 2008, Effendi initiated the National Implementation Task Force, the National Implementation Directorate and National Economic Action Council to accelerate the implementation of high impact national projects. He was principally involved in coordinating the master planning of the five corridor developments in the country. He was also appointed Joint-Chairman with Singaporean Minister for National Development
Mah Bow Tan for the Malaysia–Singapore Coordination Committee to facilitate the development of the Johor Corridor, on the
Iskandar Regional Development Authority. Effendi retired from politics in 2011 and returned to Encorp Berhad, a property development company he founded in 1995 and listed on the main board of the
Bursa Malaysia in 2003, as its Executive Chairman from 2008 to 2013. Effendi is currently the Chairman of ENcapital, an investment holding company involved in property development, construction and media plus various overseas investment and holdings. A subsidiary, ENdaya is primarily involved in infrastructure construction and maintenance in Sarawak. == Honours ==