Senior System and Network Administrator

We are seeking a Senior System and Network Administrator for a leading marine energy company based on Merseyside but operating globally to its maritime clients.<br />The company provides battery and hybrid energy solutions that are used across the maritime industry. They offer products worldwide supported by remote and on-site monitoring to ensure a first-class customer service.<br />Senior System and Network Administrator - The Role<br />This is a full-time permanent position working for an outstanding Company who will provide full training<br />The successful candidate will take ownership of the company’s IT infrastructure, networks, cloud environments, servers, monitoring systems, and core internal services.<br />This is a hands-on senior role covering network architecture, network security, Linux administration, AWS infrastructure, DNS, email systems, monitoring, backup, access control, incident response, and infrastructure automation.<br />The administrator will be expected not only to maintain existing systems, but also to improve their architecture, security, reliability, documentation, and operational efficiency.<br />What you will do

• Design, operate, and improve office, production, laboratory, and remote-access network infrastructure.
• Define network architecture, address plans, routing, segmentation, and security boundaries.
• Configure and maintain switches, routers, firewalls, wireless networks, VPN gateways, and related network equipment.
• Implement VLANs, routing policies, firewall rules, NAT, site-to-site VPNs, and remote-access VPNs.
• Maintain secure connectivity between offices, cloud environments, industrial systems, development infrastructure, and remote users.
• Administer Ubuntu and other Linux-based servers.
• Manage AWS infrastructure, including compute, storage, networking, IAM, security groups, backups, and monitoring.
• Administer DNS zones, domain registrations, records, certificates, and related infrastructure.
• Maintain company email infrastructure and email-delivery configuration.
• Manage mail routing, authentication, anti-spam controls, SPF, DKIM, DMARC, and troubleshooting of delivery issues.
• Operate monitoring and alerting infrastructure using Zabbix and related tools.
• Define monitoring coverage for servers, networks, services, certificates, backups, storage, and cloud resources.
• Develop Bash scripts and other automation for provisioning, maintenance, monitoring, and incident response.
• Manage user accounts, permissions, SSH access, privileged access, service accounts, and access revocation.
• Maintain backup and disaster-recovery systems.
• Regularly test backup restoration and disaster-recovery procedures.
• Perform server hardening, vulnerability remediation, patch management, and security reviews.<br />Senior System and Network Administrator - The Candidate<br />Preferred experience
• Senior-level experience in system administration, network administration, or infrastructure engineering.
• Strong knowledge of network architecture and network design.
• Strong understanding of TCP/IP, IPv4, subnetting, routing, switching, VLANs, NAT, DNS, DHCP, and VPN technologies.
• Experience configuring and maintaining firewalls, routers, switches, and wireless networks.
• Strong Ubuntu and Linux administration skills.
• Strong Bash scripting skills.
• Experience managing Linux services, systemd, package management, storage, networking, permissions, and logs.
• Practical AWS administration experience.
• Understanding of AWS networking, IAM, security groups, compute, storage, monitoring, and backup.
• Experience administering public and private DNS.
• Experience administering mail servers or enterprise email infrastructure.
• Understanding of SMTP, IMAP, SPF, DKIM, DMARC, mail relays, spam filtering, and email-delivery troubleshooting.<br />Senior System and Network Administrator - Benefits<br />A starting salary of £50,000pa<br />The salary is then increased as you progress through training to £52,500pa after 6 months and £55,000pa after 1 year<br />22 days holiday (plus 8 bank holidays)<br />Personal Pension Scheme<br />Excellent benefits package<br />If you think you have the necessary skills for this Senior System and Network Administrator role then please apply today