The United Nations International Computing Centre (UNICC) serves as the shared digital service provider for the United Nations ecosystem, delivering technology solutions to UN agencies and partners. In this capacity, UNICC must ensure the security and integrity of digital assets across the UN family through comprehensive security assessment services. As such, UNICC invites vendors to submit an Expression of Interest (EOI) for the provision of Cyber Security Services in the following areas: a. Lot 1: Red Team Exercise Services b. Lot 2: Penetration Testing Services c. Lot 3: Secure Code Review Services UNICC intends to invite selected vendors to participate in a formal solicitation, via a Request for Proposals (RFP), at a later stage, for the above requirements. As part of the tender exercise, companies will be invited to propose for all or any of the three above listed lots. Complete details of the requirements will be included in the solicitation documents. As a result of the tender exercise, UNICC intends to establish a roster of qualified suppliers under non-exclusive Long-Term Agreements from which services shall be requested on an as and when required basis when the need arises.