Over the last 34 years between 1984 and 2018,  Dato' Sri Alias has served the country and the Malaysian government in various capacities and departments which included the Ministry of Education ("MOE"), Prime Ministers Office, Ministry of Home Affairs ("MOHA"), State Security Department, Immigration Department, National Security Council ("NSC"), among others.

Some of the notable positions which he has held includes as Director General of the Department of Immigration, Malaysia from 2010 until 2014, Secretary General of Ministry of Domestic Trade and Consumer Affairs ("KPDNHEP") from 2014 until 2016, Secretary of NSC in 2016 before he retired as the Secretary General of the MOE in May 2018.

Dato' Sri Alias has also received numerous Excellence Service Awards from MOHA in 1993 and 1994, MOE from 1997 to 2000 and also the KPDNHEP in 2003 and 2006 respectively.

Besides that, he had held many directorships and council memberships in a number of private and public listed companies, board of government agencies, institutions, foundations and etc. He was a board member of Bank Rakyat Malaysia from 2015 until 2019, the Chairman of the Companies Commission of Malaysia from 2014 till 2016, and was also a Council Member of the Ministry of Science, Technology and Innovation from 2017 until 2018.

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