Infrastructure & Network Engineer

Infrastructure & Network Engineer at Stellar Telecommunications

Stellar brings together professionals and experts from a range of exciting domains and technologies: telecommunications (cellular 4G/5G terrestrial and non-terrestrial networks, Wi-Fi and satellites), mobility (trains, aircraft, drones and road vehicles), and software for efficient data transmission, orchestration, network management, data collection, processing and analysis, including growing AI/ML capabilities.

Our products and solutions - the STEER® Software Suite, M2M/IoT solutions and the all-in-one GLOBBLE® offering - are transforming how people and vehicles experience connectivity while on the move by enabling seamless, ubiquitous and reliable broadband services. More information is available at https://www.stellar.tc.

Stellar is an ideal workplace for professionals who are eager to learn, challenge conventional approaches, explore practical innovations and take meaningful ownership in a supportive, collaborative, results-driven, international and professional environment.

Position Summary

Reporting to the Director of Operations, the Infrastructure & Network Engineer owns the operation, maintenance, security, observability and continuous improvement of Stellar's corporate and on-site IT infrastructure. The role provides hands-on technical ownership of the physical network, firewalls, Wi-Fi, virtualization hosts, shared storage, backup and restoration, monitoring platforms, and Microsoft 365 and Microsoft Entra ID services.

As Stellar scales, this position is expected to independently assess the current environment, identify operational and security risks, define improvement and remediation plans, and implement the agreed actions. The role combines strong systems and network engineering expertise with disciplined execution, documentation and a service-oriented mindset.

Scope note: day-to-day administration of guest operating systems and hosted applications remains outside the primary scope of the position. However, the engineer is expected to assess their infrastructure and security dependencies and work with the relevant owners to identify and implement required improvements.

Key Responsibilities

As Infrastructure & Network Engineer, you will operate, maintain, secure, monitor and improve Stellar's infrastructure across the following areas:

• Network, Wi-Fi & Firewall Security

Own the availability, security, performance and configuration of Stellar's network, firewalling and Wi‑Fi across sites and network segments.

Operate and maintain network switches, routing and VLAN/trunk segmentation across corporate, customer, laboratory and infrastructure networks.

Operate and maintain Wi‑Fi access points and controllers, including Wi‑Fi 6, corporate and guest networks, and maintain the IPv4/IPv6 addressing plan and internal DNS.

Operate and maintain core, local and cloud firewalls, including filtering rules, DMZs, blocklists, remote-access VPNs and firewall high availability.

Manage the certificate lifecycle for internal services and FQDNs, and apply network and infrastructure security best practices.

• Security Assessment & Risk Remediation

Perform structured security assessments of infrastructure, identity services, applications and service dependencies; identify vulnerabilities and operational risks; define remediation plans; and implement and track approved actions.

• Identity & Access — Microsoft 365 / Microsoft Entra ID

Operate and maintain Microsoft 365 and Microsoft Entra ID, including identity and access management, role and privilege reviews, authentication controls, user lifecycle processes and security configuration.

Operate and maintain the virtualization host cluster, including hosts, high availability, heartbeat, cluster networking, virtual networks, SDN/VXLAN and cluster trunks, and contribute to the evolution of the architecture.

Operate and maintain NAS and storage volumes, including shares, NFS protocols, capacity, integrity and performance.

Implement, operate and supervise on-site and off-site backup solutions; define backup policies; execute regular restore tests; and maintain clear recovery procedures and evidence.

• Monitoring & Observability

Design, implement and operate monitoring and observability using Zabbix, Grafana and Elastic Stack, complemented by SNMP and I