[1][2] General Shamaal was appointed to the post of Chief of Defence Force on 11 December 2018 by President Ibrahim Mohamed Solih and served until 17 November 2023.

He has also attended various conferences and seminars on security and defense strategy, including the Near East South Asia (NESA) Center for Strategic Studies Executive Seminar at the National Defense University (NDU) in Washington DC in May 2001, the Non-Lethal Weapons Seminar at the Bangladesh Institute of Peace Support Operation Training (BIPSOT) in September 2003, and the Asia Public Affairs Symposium in Singapore in February 2003, and other conferences in New Delhi.

Shamaal also has the honor of being a senior member of the team that represented the presentation of the claim on the Maldives continental shelf at the United Nations HQ in New York, in March 2011.

His office in the Defence Ministry initiated and drafted the project for the soldiers to take part in the peacekeeping operations.

With the assistance from the United States government, and other countries, he has been able to host and coordinate several workshops and forums to educate and train the broader security community, practitioners and the political elite in the country on the need to create integration, participation and synergy within security agencies, and facilitate the democratization and nation-building process.