The United Nations Framework Convention on Climate Change (UNFCCC), adopted in 1992, is the basis of the intergovernmental negotiating process to address the global problem of climate change. That process is serviced by the UNFCCC Secretariat (“the secretariat”), which has been located in Bonn, Germany since August 1996. The secretariat supports all institutions involved in the process to combat climate change, particularly the COP, the subsidiary bodies and their Bureau in the implementation of the Convention and its Paris Agreement. The Paris Agreement’s central aim is to strengthen the global response to the threat of climate change by keeping a global temperature rise this century well below 2 degrees Celsius above pre-industrial levels and to pursue efforts to limit the temperature increase even further to 1.5 degrees Celsius. Additionally, the agreement aims to strengthen the ability of countries to deal with the impacts of climate change. In this context, it organizes major conferences at locations around the world, provides web-based services to 197 parties and operates various mandated information systems supporting the Kyoto Protocol mechanisms. The secretariat has been providing ICT services to all stakeholders including about 500-600 staff member, experts, consultants and external parties from all over the world during the workshops and conferences under the operation of Information and Communication (ICT) subdivision and its datacentre hosting partners. In order to perform its business objectives, the secretariat depends on a high performing and resilient network infrastructure with maximum availability and support. Therefore, the secretariat would like to establish a long-term contract with a qualified service provider who can undertake all tasks related to maintenance, implementation and support of an ICT network infrastructure with the following scopes. 1. Maintenance and support of the existing network infrastructure including LAN and WLAN based on Cisco technology. Maintenance and support of the manageable office switches based on Microsens products. 2. Network optimization including but not limited to LAN/WLAN, network management and network security solution. Support for ad-hoc project on the implementation of new network services in the headquarters and possibly in conference sites. Detailed specifications will only be provided as part of the Invitation To Bid, which will be issued after the closing date of this request for EOI.