Network Security Monitoring Cluster (NSMC) is Centre of excellence in terms of cyber and network security. NSMC is network of companies, organizations and universities focusing on cyber security. NSMC gathers companies engaged in IT security, focusing mainly on network security (including inner networks and the Internet) and IT security related topics such as IT law, protection of personal data, competitive intelligence and facility management. NSMC main activities are: • Evangelization and awareness building (education, training), • Research Development, • Networking and Representation. NSMC provides services to companies and organizations, particularly in terms of network security, such as CERT, Network Behavior Analysis, Network Traffic Audit, SIEM solutions, complex network solutions, education and training, network security monitoring consultancy etc. The core of the cluster structure are universities spin-off companies, providing complex state-of-the-art solutions in monitoring, administration and computer network security covering all stages of data network security surveillance. Their solutions enable to detect operation and security issues that are undetectable by commonly used tools in order to increase external and internal security of a data network. It allows operating the IT infrastructure, which is critical for support of business processes, cheaper and more efficiently. The main advantage over standard approaches lies in the overall behaviour analysis of devices in the network. Companies develop solutions for high-speed network applications (using FPGA up to 100 GB). The NSMC cooperates with companies, universities and other foreign partners and clusters, mainly from Belgium, United Kingdom, Spain, Estonia, Hungary, Slovakia and Germany and also with many cluster projects. NSMC is linked to Czech Association of Research Organizations, Czech Chamber of Commerce and National Cluster Association and closely cooperates with Czech ICT Alliance in terms of international strategy and business development of its member companies. NSMC is highly valued cluster and was awarded with Bronze Medal of Cluster Management Excellence.