Senior System & Network Administrator - Linux, AWS & Security

Fort Recruitment; Birkenhead; On-site; GBP 50,000 - 55,000; Full time

Benefits offered by this job

22 days holiday

Bank holidays

Personal Pension Scheme

Excellent benefits package

Job summary

Fort Recruitment seeks a Senior System and Network Administrator to own and optimize the global IT backbone for a marine energy company. You will design and secure network infrastructure, manage cloud and on-site environments, and automate operations.

The role demands hands-on expertise in Linux (Ubuntu), AWS, DNS, mail systems, and security practices, with a focus on reliability and scalable architecture. On-site in Merseyside with full training provided.

Qualifications

• 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.

Responsibilities

• 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.

Skills

System administration

Network administration

Infrastructure engineering

Linux administration

AWS administration

Network security

Bash scripting

DNS management

Email infrastructure

Monitoring (Zabbix)

Tools

Zabbix

Ubuntu

AWS

Job description

Fort Recruitment seeks a Senior System and Network Administrator to own and optimize the global IT backbone for a marine energy company. You will design and secure network infrastructure, manage cloud and on-site environments, and automate operations.

The role demands hands-on expertise in Linux (Ubuntu), AWS, DNS, mail systems, and security practices, with a focus on reliability and scalable architecture. On-site in Merseyside with full training provided.