Multi-technology critical network engineering: competencies and operational challenges
The design of telecommunications networks for critical infrastructures requires a systemic approach that goes beyond the selection of access technologies. The engineer specialising in this field must understand the interaction between heterogeneous network layers — from low-power wide-area technologies such as NB-IoT or LoRaWAN to fifth-generation cellular networks and fibre-optic backhaul — and ensure that the resulting architecture meets the availability, latency and traffic segmentation requirements characteristic of mission-critical environments. The ability to model coverage, interference and switching mechanisms between technologies is a core competency within this profile. Redundancy and resilience constitute fundamental design axes when the network supports essential services in urban environments. This entails defining topologies with alternative routes, failover mechanisms between access technologies, and management planes that enable fault detection and isolation without service interruption. The professional must also be familiar with the regulatory frameworks governing public safety communications and the service continuity requirements established by European critical infrastructure directives, given that these directly condition architectural decisions. The multi-technology nature of these networks introduces complexity in the integration of management and monitoring systems. The required technical profile combines knowledge of network protocols, radio spectrum management, and an understanding of the control and user planes in disaggregated architectures. In urban environments, factors such as node densification, the coexistence of licensed and unlicensed bands, and coordination with passive infrastructure operators add planning dimensions that require accredited experience in real-world deployments, not solely in theoretical design. This profile operates at the intersection of cybersecurity, embedded systems and engineering project management disciplines, which demands the capacity for cross-functional work with teams from different specialisms. Coordination with public administrations and essential service operators additionally requires the ability to translate technical decisions into functional requirements that are comprehensible to non-specialist interlocutors, whilst maintaining the rigour of engineering documentation. NASSAT has an open vacancy for a Telecommunications and Connectivity Engineer, in a full-time remote working arrangement. The position requires a Bachelor's or Master's degree in Telecommunications Engineering, Electronics, Computer Science or an equivalent qualification, together with a minimum of three years of demonstrable experience in the design or deployment of multi-technology networks — including 5G, NB-IoT, LoRaWAN and fibre — and in critical communications in urban environments. Full information on requirements and the application process is available on the NASSAT Employment Portal: nassat.com/empleo.html.
NASSAT - Network Satellite Systems