Early career Yusoff began his government career as a Religious Education Officer in 1979 and was later appointed as the Head Religious Teacher at the
Sixth Form Centre in 1980. In 1985, he became the Principal of the
Raja Isteri Pengiran Anak Damit Girls' Arabic Religious School and subsequently served as the Principal of the
Hassanal Bolkiah Boys' Arabic School from 1986 to 1990. Following this, he was appointed as the Principal of Ma'had Islam Brunei from 1990 to 1992. Yusoff was appointed as the Head of the Secretariat for the Southeast Asia and Pacific Islamic Youth Conference held in Brunei in conjunction with the 1st Brunei Independence Day Celebration in 1984. He attended several regional and international conferences, such as MABIMS,
OIC,
ISESCO, and
IIFSO, and in 2001, he presented a paper in Malaysia entitled "Implementation of Zakat Collection and Distribution – Brunei Darussalam's Experience." In 1993, he was loaned to serve at
Islamic Bank of Brunei (IBB) until 1995, after which he returned to the
Ministry of Religious Affairs (MoRA) as the assistant director of Mosque Affairs. He then advanced to the position of Senior Special Duties Officer at the Ministry in 1997. His career progressed further when he was appointed Deputy
Permanent Secretary at the MoRA on 10 July 2003, and later became the Permanent Secretary in 2004. In 2005, he was appointed as the Permanent Secretary at the Ministry of Internal Affairs, where he served until 2007. During this time, he also held significant roles such as Member of the Public Service Commission from 2007 to 2010, chairman of the Board of Directors of Darussalam Holdings from 2003 to 2010, and deputy chairman of the Board of Directors of Brunei Islamic Trust Fund from 2007 to 2010. Yusoff underlined on 26 March 2015, the significance of Islamic Tasawwur in moulding human nature and conduct via a revelation-based educational approach. He stressed that in order to guard against ignorance and erroneous interpretations of religious teachings, successful education incorporates spirituality and knowledge. In order to attend the first Joint-Working Group Meeting between the education ministries of
Vietnam and Brunei, Yusoff flew to
Hanoi. The conference, which took place from 2 to 3 April, was an extension of a collaboration established in 2014 through a
Memorandum of Understanding. It focused on many educational projects and included visits to neighboring educational institutions. On 19 May 2015, Yusoff reiterated that the government's dedication to appreciating contributions from both the public and private education sectors is demonstrated by the Excellent Student Award Committee's acknowledgment of private schools. He pointed out that the achievement of a Tionghua student from Maktab Ilmu Paduka Seri Begawan Sultan in Islamic Religious Knowledge (PUI) shows how studying Islam may help non-Muslim students comprehend the faith better. From 14 to 15 October 2015, he attended the
OECD Higher Education Conference in Singapore, where the main topics of discussion were how to align educational systems with industry demands and adjust to changing social, economic, and technological circumstances. Following a
cabinet reshuffle on 22 October 2015, his tenure as minister came to an end.
Diplomatic career Yusoff was given the
letter of credence by
Sultan Hassanal Bolkiah on 23 March 2016, designating him as Brunei Darussalam's Ambassador to Saudi Arabia. Three foreign envoys to Brunei also presented their inaugural letters to the Sultan at the occasion at
Istana Nurul Iman. After his recent appointment, Crown Prince
Al-Muhtadee Billah welcomed him on 29 March. On 15 March 2017, Ambassador Yusoff gave a presentation of his credentials to the OIC, reiterating Brunei's commitment to the organization and indicating his intention to work closely with the OIC General Secretariat,
Yousef Al-Othaimeen. The official appointment of him as Ambassador of Brunei Darussalam to the Kingdom of Saudi Arabia took place on 23 March 2017, when he received his letter of credence from Sultan Hassanal Bolkiah. Later on 23 April, he noted that the recent visit by
King Salman to Brunei signalled the beginning of a new chapter in the two countries' bilateral ties. Ambassador Yusoff took part in a virtual Haj Management meeting on 27 December 2022, with the Saudi Arabian
Ministry of Hajj and Umrah. The topics of discussion included Brunei's pilgrim quota, accommodations, transportation, and safety protocols for the approaching
hajj season. On 20 October 2023, he was present to witness the Sultan Hassanal Bolkiah's departure for the ASEAN–
Gulf Cooperation Council Summit in
Riyadh. He said final farewell to
Minister Adel al-Jubeir on 25 January 2024, in Riyadh, following Al-Jubeir's resignation from the position. On 17 February 2024, the Sultan presented letter of credence to the newly appointed Brunei Darussalam envoys, including Harun Junid, who succeeded Yusoff as Ambassador to Saudi Arabia. == Personal life ==