On 21 January 1986, Kaikaus joined the Bangladesh Civil Service in the administrative cadre. He has worked as a Upazila Nirbahi Officer, magistrate and several other positions in the field and central secretariat in the early stages of his career. He served as the chairperson of the Bangladesh Energy and Power Research Council. He taught at the
American International University-Bangladesh and
Collin College in Texas. On 23 February 2017, he was appointed secretary in charge of the
Power Division of the
Ministry of Power, Energy and Mineral Resources. In August 2019, he led the Bangladeshi team to the joint steering committee on Bangladesh-India Power Sector Cooperation. He rejected the import of electricity from Tripura, finding its infrastructure inadequate. On 29 December 2019, he was appointed the Principal Secretary of the
Prime Minister's Office under Prime Minister
Sheikh Hasina. He was reappointed by the prime minister in December 2020 with a 2-year extension. On 7 February 2024, Kaikaus was relieved from his role as the Alternate Executive Director of World Bank Group with immediate effect. After the fall of the Sheikh Hasina led Awami League government, a murder case was filed against him by Bangladesh Nationalist Party politician Mohammad Zaman Hossain Khan over the death of a protestor in July 2024. ==References==