Senior Network Engineer - Hybrid Cloud & Security

Viasat; Greater London; Hybrid; GBP 70,000 - 110,000; Full time

Job summary

Viasat is seeking a Senior Network Engineer to ensure reliable, secure, and scalable enterprise network operations across on‑premises and cloud environments. You will contribute to network architecture, deployment, and operational readiness, partnering with infrastructure, security, and application teams.

The role requires deep networking expertise, cloud networking experience, and leadership to drive disciplined execution in a fast‑paced environment.

Qualifications

• Strong hands‑on experience designing, implementing, and supporting enterprise networks.
• Deep security expertise: firewalls, segmentation, encryption, secure access, IDS/IPS.
• Expertise in routing/switching technologies (Cisco, Aruba, Juniper, Meraki).
• Knowledge of core protocols: TCP/IP, DNS, DHCP, BGP, OSPF, VLANs, VPNs.
• Experience with hybrid cloud networking and cloud‑native constructs (VPC/VNet, routing, security groups).
• Experience with SD‑WAN architectures and implementations.
• Familiarity with monitoring/logging/observability tools (SNMP, NetFlow, Syslog, modern NPM).
• Compute platforms/OS (Windows, Linux, VMware/Hyper‑V).
• Strong root cause analysis across network and infra layers.
• Experience with high availability, DR planning.

Responsibilities

• Design, implement, and support enterprise network solutions across on‑prem and cloud environments.
• Deploy and maintain routing, switching, wireless, firewalls, and secure remote access.
• Lead architecture decisions focused on scalability, resiliency, and security.
• Enforce network security controls including zero trust principles.
• Support hybrid connectivity models (site‑to‑site VPN, ExpressRoute, Direct Connect, SD‑WAN).
• Monitor performance with observability tools and address capacity issues.
• Troubleshoot complex cross‑domain network/infrastructure issues.
• Document network diagrams, IPAM, standards, and runbooks.
• Collaborate with security teams on remediation and compliance.
• Coordinate with vendors/ISPs for circuit delivery and issue resolution.
• Contribute to automation for provisioning, configuration management, and ops tasks.
• Participate in on‑call rotations and maintenance windows.

Skills

Network design

Network security

Routing & switching

Cloud networking

SD‑WAN

Observability/telemetry

Incident response

Documentation

Automation

On‑call support

Job description

Viasat is seeking a Senior Network Engineer to ensure reliable, secure, and scalable enterprise network operations across on‑premises and cloud environments. You will contribute to network architecture, deployment, and operational readiness, partnering with infrastructure, security, and application teams.

The role requires deep networking expertise, cloud networking experience, and leadership to drive disciplined execution in a fast‑paced environment.