Senior Network Engineer — Remote-First, High Availability

Trellint UK; Portsmouth; Hybrid; GBP 65,000 - 95,000; Full time

Benefits offered by this job

Remote-first flexibility

Hybrid or on-site options

Occasional travel

Job summary

Trellint UK is seeking a Senior Network Engineer to lead the design, deployment, and support of enterprise network infrastructure across our UK data center and office environments. You’ll own network solutions for data center networking, load balancing, and core services to ensure high availability and security.

The role involves mentoring engineers, coordinating with IT leadership, and delivering secure, reliable services.

Qualifications

• Bachelor’s degree in Computer Science, Computer Information Systems, or related field.
• CCNP, CCIE, CISSP or equivalent preferred.
• 7+ years of enterprise network engineering experience.

Responsibilities

• Lead design, implementation, and support of enterprise network infrastructure across UK data centers and offices.
• Architect solutions and mentor team members.
• Ensure high availability, performance, and security of core network services.
• Deploy FortiGate firewalls and FortiADC load balancers with HA configurations.
• Configure Dell L2/L3 switching and routing (OSPF).
• Provide secure VPN access for admin and operational use.
• Participate in incident response and root-cause analysis.
• Align network controls with ISO 27001 and Cyber Essentials Plus.

Skills

Core Networking

TCP/IP

Routing

Switching

VLANs

FortiADC

FortiGate

VPN

Education

Bachelor’s degree

Tools

Dell switches

Job description

Trellint UK is seeking a Senior Network Engineer to lead the design, deployment, and support of enterprise network infrastructure across our UK data center and office environments. You’ll own network solutions for data center networking, load balancing, and core services to ensure high availability and security.

The role involves mentoring engineers, coordinating with IT leadership, and delivering secure, reliable services.