About this role
Salary: £50,000 - 55,000 per year
Requirements: Senior-level experience in system administration, network administration, or infrastructure engineeringStrong knowledge of network architecture and network designStrong understanding of TCP/IP, IPv4, subnetting, routing, switching, VLANs, NAT, DNS, DHCP, and VPN technologiesExperience configuring and maintaining firewalls, routers, switches, and wireless networksStrong Ubuntu and Linux administration skillsStrong Bash scripting skillsExperience managing Linux services, systemd, package management, storage, networking, permissions, and logsPractical AWS administration experienceUnderstanding of AWS networking, IAM, security groups, compute, storage, monitoring, and backupExperience administering public and private DNSExperience administering mail servers or enterprise email infrastructureUnderstanding of SMTP, IMAP, SPF, DKIM, DMARC, mail relays, spam filtering, and email-delivery troubleshooting Responsibilities: Design, operate, and improve office, production, laboratory, and remote-access network infrastructureDefine network architecture, address plans, routing, segmentation, and security boundariesConfigure and maintain switches, routers, firewalls, wireless networks, VPN gateways, and related network equipmentImplement VLANs, routing policies, firewall rules, NAT, site-to-site VPNs, and remote-access VPNsMaintain secure connectivity between offices, cloud environments, industrial systems, development infrastructure, and remote usersAdminister Ubuntu and other Linux-based serversManage AWS infrastructure, including compute, storage, networking, IAM, security groups, backups, and monitoringAdminister DNS zones, domain registrations, records, certificates, and related infrastructureMaintain our company email infrastructure and email-delivery configurationManage mail routing, authentication, anti-spam controls, SPF, DKIM, DMARC, and troubleshoot delivery issuesOperate monitoring and alerting infrastructure using Zabbix and related toolsDefine monitoring coverage for servers, networks, services, certificates, backups, storage, and cloud resourcesDevelop Bash scripts and other automation for provisioning, maintenance, monitoring, and incident responseManage user accounts, permissions, SSH access, privileged access, service accounts, and access revocationMaintain backup and disaster-recovery systemsRegularly test backup restoration and disaster-recovery proceduresPerform server hardening, vulnerability remediation, patch management, and security reviews Technologies: AWSBashCloudFirewallIAMLinuxNATNetworkSecurityTCP/IPUbuntuVPNZabbix More:
We are a leading marine energy company based on Merseyside and operating globally for maritime clients. We provide battery and hybrid energy solutions used across the maritime industry, supported worldwide by remote and on-site monitoring to deliver first-class customer service. This is a full-time, permanent Senior System and Network Administrator position, and we provide full training. The role takes ownership of our IT infrastructure, networks, cloud environments, servers, monitoring systems, and core internal services, with a focus on improving their architecture, security, reliability, documentation, and operational efficiency. The starting salary is £50,000 per year, rising in guaranteed £2,500 annual increments to £52,500 after six months and £55,000 after one year. Benefits include 22 days of holiday plus eight bank holidays, a personal pension scheme, and an excellent benefits package.
last updated 40 week of 2026