Network Security Technical Authority

The role of the Network Security Technical Authority sits within the Transport team in Three UK, which is responsible for providing subject matter expertise and guidance to business units across Three’s Network and Enterprise domains, building customer trust in a reliable network which matches the best, whilst ensuring compliance to regulatory requirements, company policy and standards.

In this role you will be responsible for the design, implementation, and maintenance of Three UK’s Firewall Infrastructure (Firewalls, Management Solutions and Assurance and Governance Solutions) to ensure the security of Three’s network and systems.

• Providing technical security engineering support to ensure Firewall Infrastructure (Firewalls, Management Solutions and Assurance and Governance Solutions) requirements and outcomes are defined and considered throughout the project lifecycle from conception to operations.
• Understand Three’s network and have a strategic long-term vision for the Firewall Infrastructure
• Provide input to budget planning and road maps for the Firewall Infrastructure including capacity planning, expansion, and service improvements, defining requirements and working with colleagues and partners to deliver then hand over to Operations; you will need to be able to successfully challenge and govern partner activities and have an awareness of partner contracts.
• Support Programme and Project Managers in project planning, risk and issue management and the budgeting process.
• Recommend Firewall Infrastructure solutions and provide design input and technical approvals, assurances, and governance of deliveries that the project carries out with our colleagues and partners. 
• As the Subject Matter Expert (SME) you will improve and support the implementation of firewall security policies, standards, patterns, processes, and procedures, you will understand supporting infrastructure such as Cisco ISE, MS AD, MS PKI, Splunk ES etc.
• Working with various members of Three’s Security team including the Security Assurance Manager (SAM) to implement and maintain Firewall Infrastructure to meet security policy and standards.
• Ensure effective Firewall Infrastructure lifecycle, asset, performance, fault, configuration, capacity, incident, problem, change management is in place.
• Within the Transport team, you will be expected to collaborate with the wider team and colleagues providing technical support and guidance.
• Collaborate closely with a broad range of stakeholders across the business and be able to articulate the Firewall Infrastructure product vision, principles, and standards within Three and our partners.
• Provide Firewall Infrastructure security requirements and design input across several projects or technologies across Three’s Network and Enterprise business domains at any one time.
• Conduct regular Firewall Infrastructure audits and generate reports on Firewall Infrastructure status.
• Working with partners to monitor Firewall Infrastructure performance and troubleshoot issues that arise.
• Create, review, and approve requirements, architecture, design, delivery and test documentation and other artefacts used in the design and delivery lifecycle by Three and its partners, ensuring that effective governance and technical assurance can be performed.
• Provide effective governance and assurance of deliverables by our partners and internal teams within Three, where necessary supporting review and approvals.
• Maintain an in-depth knowledge of industry standards and have an evolving level of technical expertise.

• Must have at least 5 years of hands on experience working in Firewall Management, with proven experience as a Firewall Engineer, Architect or similar role.
• Bachelor’s degree in Computer Science, Information Technology, Security Engineering Cyber Security or a related field.
• Strong knowledge of firewall technologies, network principles including protocols and routing, and security fundamentals.
• Detailed knowledge of Check Point, Cisco, Fortinet, Palo Alto, Nokia, Clavister firewalls and equivalent management solutions.
• Two or more of the following vendor related certifications would be desirable: Check Point CCSM/CCSE/CCSA, Cisco CCIE/CCNP Security, Fortinet Certified Associate (FCA), Palo Alto PCNSE/PCNSA, Clavister NetShield Expert
• Detailed knowledge of Security Assurance and Governance solutions such as Skybox, Tufin, Algosec.
   

• Competitive annual salary, car cash allowance, a performance based annual bonus & an additional 'flexible allowance' to spend on additional benefits, topping up your pension, or to be added to your salary.
• Hybrid working between your home (2-3 days a week) and our brand new Reading HQ office at Green Park (2-3 days a week)
• 28 days annual leave + 8 bank holidays + 3 personal days annually, which increases with length of service
• Private Medical Insurance, Life Assurance and Income Protection
• Free mobile phone package & unlimited sim-card
• Free on-site car parking 
• Plus lots more including well-being and learning & development benefits!

Salary range for this role start's at £59,120, and exact salary will differ by job and experience

Our people make us who we are. We’re a diverse and inclusive bunch, and it’s important you can feel you belong here. We value everybody for who they are and what they bring to the table, supporting one another as we continue to deliver for our customers.

With that in mind, if you do not ‘tick every box’ in the job advert above, there are likely other valuable attributes and skills you have that would make you a great addition for the team. So, if you feel this role is for you, then please apply! We are committed to equality in employment and growing a diverse workforce. We embrace those of any race, gender identity, sexual orientation, age, religion, disability, marital status, family status or civil status and we want our teams to reflect this!

We are a Disability Confident Committed Employer. Need any reasonable adjustments? Let us know when you apply so we can support you throughout the interview process.

At Three we have a hybrid working arrangement in place as standard for office based employees, where employees work from a mix of office based location and working from their home in the UK to carry on their role.

Excluding retail, our core hours at Three are between 10:00 and 16:00, with operating hours between 08:00 & 18:30. This allows employees to have a start time between 08:00 and 10:00 and finish time between 16:00 and 18:30.