Network Security Specialist - (45874)

JR United Kingdom; Sheffield; Hybrid; GBP 55,000 - 75,000; Full time

Job summary

A leading company in secure communications is seeking a Senior Technical Lead to provide expertise in network security and cyber security. This role involves leading Agile processes, mentoring peers, and ensuring service delivery while adapting to evolving technology trends. The ideal candidate will hold relevant certifications and possess extensive experience in network automation and complex troubleshooting, all while enjoying flexible working arrangements.

Benefits

10% on-target bonus

25 days annual leave

Flexible benefits (cycle to work, healthcare, season ticket loan)

World-class training

BT Shares scheme

Discounted broadband/mobile/TV

Retail discounts

Family leave policies

Qualifications

• Experience as a senior engineer or technical lead interfacing with stakeholders.
• Experience troubleshooting complex enterprise networks and related technologies.
• Experience in network automation, prototyping, testing solutions, and iterative development.

Responsibilities

• Provide leadership on Agile / ITIL processes and be a decision maker within the security team.
• Develop peers through mentoring, providing trustworthy feedback.
• Ensure the safeguarding of sensitive customer information.

Skills

Problem-solving

Analytical skills

Communication skills

Leadership

Agile methodologies

Network automation

Mentoring

Education

PCNSE / CCNP or equivalent professional certification

Job description

Locations: Sheffield, Belfast, and Hatfield

Salary: Competitive + Benefits

Why This Job Matters:

Do you want to play a key role in securing the future of communication?

At BT, we harness the power of communication to create a better world—for each other, our customers, society, and our communities. In this role, you will provide specialist technical support for complex network security and cyber security deployments across our UK secure contracts. Success in this role relies on building strong working relationships, earning trust through effective communication, and delivering on expectations and deadlines. You’ll also work closely with customer representatives, vendors, and internal teams to ensure seamless service delivery.

Innovation and adaptability are at the heart of what we do. As part of this role, you will also support the development of new products and services, ensuring we stay ahead of industry trends and meet evolving customer needs. Your ability to work proactively, manage priorities effectively, and apply initiative will help BT remain a trusted leader in secure communication.

What You’ll be Doing:

• Provide leadership on Agile / ITIL processes and be a decision maker within the security team; advising those working directly with you on best practices and supporting from a 3rd Line perspective.
• Develop peers and colleagues through mentoring and leadership, providing trustworthy honest feedback.
• Produce and support policies, functions, and configuration builds to enable implementation of customer projects.
• Complete and own integration testing on new products and services, producing all relevant supporting documentation.
• Ensure full awareness of the need to safeguard sensitive customer information, maintaining BT’s reputation as a trustworthy organization.
• Experience in agile, lean, evidence-based, and human-centered design frameworks.
• Able to simplify complex ideas and communicate them clearly.
• Design user journeys, service maps, documentation, user flows, and wireframes.
• Motivated team player capable of working collaboratively to build features impacting customers.
• Ownership of production platforms and products from inception to continuous improvement.

What we'd like to see on your CV:

• PCNSE / CCNP or equivalent professional certification.
• Experience in network automation, prototyping, testing solutions, and iterative development.
• Experience as a senior engineer or technical lead interfacing with stakeholders.
• Excellent problem-solving, analytical, and communication skills.
• Experience troubleshooting complex enterprise networks and related technologies.
• Additional benefits include: 10% on-target bonus, 25 days annual leave, flexible benefits (cycle to work, healthcare, season ticket loan), world-class training, BT Shares scheme, discounted broadband/mobile/TV, retail discounts, and family leave policies.

Flexible working allows for hybrid arrangements—work from home 2 days per week, at your contractual location 3 days a week.