Senior Specialist Engineer - Networks

UK Health Security Agency; Liverpool; On-site; GBP 65,000 - 85,000; Full time

Job summary

UK Health Security Agency seeks a Senior Specialist Engineer - Networks in Liverpool to lead design, deployment and resilience of the network estate. You will act as a technical authority during major incidents and work with cross-functional teams to ensure secure, available, high-performance services.

The role combines architecture leadership with hands-on guidance, developing high and low level designs and training colleagues to enhance network capability across the organisation.

Qualifications

• Significant experience in enterprise network architecture and incident management.
• Ability to produce High Level Designs (HLD) and Low Level Designs (LLD).
• Experience working with multi-disciplinary teams to resolve complex incidents.

Responsibilities

• Own and maintain understanding of the network architecture across the estate.
• Act as primary network authority during major incidents, coordinating resolution.
• Develop and maintain HLDs, LLDs and As-Built records for networks.
• Provide guidance and training to improve services for end users.

Skills

Network architecture

Incident response

Technical leadership

Network design

Cross-functional collaboration

Education

Bachelor's degree in Computer Science or related field

Tools

Network monitoring tools

Documentation tools

Job description

The Senior Specialist Engineer - Networks, is a senior technical role responsible for delivering and maintaining excellence across the network infrastructure estate. The post holder acts as a subject matter expert and network architect, driving the design and evolution of the network environment, providing expert-level technical leadership during major incidents, and working across multi-disciplinary teams to ensure network services underpin the organisation's operational and scientific mission. Working alongside the Network Manager, the post holder ensures all systems are optimally configured, resilient, secure, and performant. Beyond day-to-day operational responsibilities, the role carries explicit accountability for network architecture, strategic design, and cross-functional incident response.,

• Own and maintain a comprehensive and current understanding of the network architecture, acting as an authoritative technical reference for network design decisions.
• Maintain consistent availability and performance across specialist network systems, collaborating with other specialist engineers and ICT colleagues as required.
• Act as a primary network technical authority during major incidents, coordinating resolution activity across multi-disciplinary teams including infrastructure, security, application, and service management functions.
• Act as a technical point of expertise, providing advice, guidance, and training to improve and enhance services for end users.
• Support the Network Team in ensuring hardware, software, and associated technologies are designed, procured, and delivered efficiently and cost-effectively.
• Contribute to and lead the production of network architecture documentation, including High Level Designs (HLD), Low Level Designs (LLD), and As-Built records.
• We pride ourselves as being an employer of choice, where Everyone Matters promoting equality of opportunity to actively encourage applications from everyone, including groups currently underrepresented in our workforce.
• UKHSA ethos is to be an inclusive organisation for all our staff and stakeholders. To create, nurture and sustain an inclusive culture, where differences drive innovative solutions to meet the needs of our workforce and wider communities. We do this through celebrating and protecting differences by removing barriers and promoting equity and equality of opportunity for all.
• This role also attracts a market pay supplement of £6650 per annum (to be reviewed in February 2027).