Senior Network & Security TDA Engineer

Job Title: Senior Network & Security TDA Engineer 

Contract Type: 12 Month Fixed Term Contract
Function: CIO
Location – London or Edinburgh (hybrid between office and home)
Salary: £60000 - £70000 (Edinburgh) & £65000 - £75000 (London) + Excellent Benefits
Closing Date: 6 March 2026
 

How you’ll make a difference
The Senior Network & Security TDA Engineer plays a pivotal role in delivering robust, secure, and well designed network services across TSB by acting as the technical lead for F5 LTM/GTM platforms and other core network and security technologies. 

The role ensures end to end design quality, drives architectural improvements, supports project delivery, collaborates with suppliers and internal stakeholders, and provides expert L3 escalation support. A strong candidate will make a significant difference by bringing deep technical leadership, delivering high quality solution designs, improving operational standards, and shaping the evolution of TSB’s network and security infrastructure.

What you’ll bring

• Proven background in technically leading and supporting complex network/security environments within large, multi site organisations.
• Strong design and problem solving capability, contributing to operational improvements aligned to business strategy. 
• Subject matter expertise in F5 LTM and GTM platforms, acting as an escalation point. 
• Ability to produce and maintain high quality design standards, patterns, and documentation to support governance and configuration processes. 
• Experience in end to end solution design, engineering, deployment, and collaboration with managed service providers and suppliers. 
• Strong technical knowledge across TSB relevant platforms such as Cisco R&S/ACI, NG Firewalls (Fortinet/Cisco/Palo Alto), SD WAN, ISE/TACACS, Proxy, Infoblox, Forescout, Meraki WiFi, Akamai, etc. 
• Ability to gather technical requirements and translate them into detailed solution design documentation. 
• Experience providing L3 engineering support, troubleshooting complex deployments, and supporting project related technical issues.

What we offer in return

• Hybrid and flexible working arrangements to support a healthy work/life balance.
• An attractive reward and benefits package through myTSB, giving you more of what matters to you.
• A diverse, energising, and collaborative working environment.
• A career that’s enriching and full of opportunities.

Selection process
There will likely be a 30-minute informal, exploratory chat with the Hiring Manager followed by a structured interview via Teams with the Hiring Manager plus another member of the team. Here are some of the questions you’ll be asked at interview:

• What is it about a career at TSB that excites you?
• Describe your approach to communicating with your key stakeholder groups.
• Tell me about a situation where you have been required to lead others through a time of significant change or uncertainty.
• How will you ensure your team feel a sense of inclusion, belonging and equality daily?

So, if this sounds up your street, come join our team, we make things happen!