Overview
As a Principal Cyber Security Engineer at O2 Daisy, you will serve as a senior technical leader within the Security Operations function, responsible for ensuring the confidentiality, integrity, and availability of O2 Daisy’s cyber security portfolio. Operating at the national level, you will provide expert technical guidance, leadership, and hands-on support across internal operations and external customer engagements. In this critical role, you will guide and work alongside a team of security specialists, fostering their development and coordinating efforts to deliver world-class security solutions. You will act as a trusted advisor across our Virgin Media Business, O2 Business, Virgin Media O2, and Daisy brands offering specialist support delivering, maintaining, and improving our products. You’ll be interfacing with Order & Delivery teams, Business Operations, Product Management, Network Engineering, and external suppliers.
Location
Birmingham, London, Manchester, Peterborough, Reading
Job family
Digital & Technology
Posted date
Posted Date: 18-Aug-2025
Ref
68822
Responsibilities
* Provide expert technical guidance, leadership, and hands-on support across internal operations and external customer engagements.
* Guide and work alongside a team of security specialists, fostering their development and coordinating efforts to deliver world-class security solutions.
* Act as a trusted advisor across Virgin Media Business, O2 Business, Virgin Media O2, and Daisy brands offering specialist support delivering, maintaining, and improving our products.
* Interface with Order & Delivery teams, Business Operations, Product Management, Network Engineering, and external suppliers.
The must haves
* Palo Alto PCNSE certification or equivalent hands-on experience, including strong knowledge of Strata Cloud Suite.
* Cisco security certification (minimum CCSP) or solid experience in multi-vendor environments (Palo Alto, Cisco, Fortinet, Juniper, F5, Zscaler, Versa)
* Strong knowledge of Cisco routing and switching technologies, with experience configuring and troubleshooting complex LAN/WAN networks.
* Proven ability to implement and support complex security solutions and maintain governance & compliance controls.
* Ability to work across secure environments and obtain NPPV3 + SC clearance.
* Willingness to participate in a 24x7 on-call rota and provide out-of-hours support
The other stuff we are looking for
* Advanced certifications such as CISSP, CISM, or CCSP.
* Vendor-specific certifications beyond the essentials, e.g., Fortinet, Cisco Security, Versa
* Experience with cloud security platforms and hybrid environments.
What’s in it for you
Our goal is to celebrate our people, their lives and everything in-between. We aim to create a culture that empowers everyone to bring the best versions of themselves to work each and every day. We believe the most inclusive and diverse culture makes for a better business and a brighter world. Working at Virgin Media O2, you get a bumper reward package bursting with benefits, and loads of extras you can add if you’d like to. These are designed to support both you and your loved ones, making sure that you’re covered no matter what life throws your way.
Next steps
If we feel like a place where you can belong, we'd love to learn more about you as a person and your experience to date. Once you've submitted an application the next steps of the process, if successful, are likely to include an initial chat with the Hiring Manager, a competency and technical interview.
When you apply, you'll be asked about any adjustments you might need to support the recruitment process. Let us know, and we'll be sure to discuss it with you.
Please note: Applications will be reviewed, and interviews conducted throughout the duration of this advert, therefore we may bring the closing date forward. We encourage all interested applicants to apply as soon as possible. If you’re offered a job with us, it will be conditional, based on the passing of background checks. All roles require a criminal record check and some roles need a financial probity check. Your recruiter can provide you with more information if needed.
Thanks for your patience and for showing an interest in joining the Virgin Media O2 family.
Seniority level
* Mid-Senior level
Employment type
* Full-time
Job function
* Information Technology
Industries
* Telecommunications
Virgin Media O2 is an equal opportunities employer and we're working hard to remove bias and barriers for our people and candidates. So, we build equity and inclusion into everything we do, from the policies we craft to the relationships we shape. We support and encourage you to be your authentic self throughout your application journey with us.
Accessible, inclusive and equitable for all.
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