This Request for Expression of Interest (REOI) is a follow-up to the Requests for Information (RFIs) posted by the UN on 02 March 2021 (ref. RFIRR3375) and on 19 October 2021 (ref. RFIUNPD19016). The purpose of this REOI is to update vendors on the UN requirement and identify suitable service providers to be invited to the tender exercise. The UN intends to conduct a procurement exercise for the fully manned services of small/tactical Class I Unmanned Aircraft Systems (UAS) for the provision of Intelligence, Surveillance and Reconnaissance (ISR) services in support of the United Nations Multidimensional Integrated Stabilization Mission in the Central African Republic (“MINUSCA” or the “Mission”).