SIEM Content Development Specialist

Join Us

At Vodafone, we’re not just shaping the future of connectivity for our customers – we’re shaping the future for everyone who joins our team. When you work with us, you’re part of a global mission to connect people, solve complex challenges, and create a sustainable and more inclusive world. If you want to grow your career whilst finding the perfect balance between work and life, Vodafone offers the opportunities to help you belong and make a real impact.

What You’ll Do

The SIEM Content Development Specialist plays a critical role in advancing the Cyber Security Operations Center’s ability to detect and respond to cybersecurity incidents. This role focuses on designing and developing cutting-edge detection content leveraging a wide array of security technologies and telemetry to identify malicious activity and guide security analysts through effective response playbooks.

Working within a threat-led framework, the specialist collaborates across teams to translate threat intelligence into actionable detection logic and response workflows. The position demands strong technical acumen, analytical thinking, and problem-solving capabilities, along with the ability to communicate clearly with peers, leadership, and cross-functional stakeholders.

Key accountabilities and decision ownership:

• Contribute to continuous improvement initiatives across multiple technologies by developing and refining content that enhanced threat detection and response capabilities

Participate in residual risk assessments, supporting post-incident analysis and the documentation of operational and technical lessons learned

Collaborating with data owners and customers on understanding data sources and use cases and successfully translating requirements to actionable content

Who You Are

Core competencies, knowledge and experience:

• Minimum of 2-5 years’ experience in SIEM content (rule logic and code) development role
• Minimum of 2 years of SOC analyst experience (Level2 or above) required
• In depth and extensive hands-on experience in security event analysis, create and refine SIEM/EDR rules and deliver efficiency within the SIEM and all other technologies used within the team
• Deep knowledge of IPv4/IPv6, TCP networking protocols
• Deep knowledge of Windows/Linux operating systems
• Exceptional working knowledge of security technologies such as SIEM (ArcSight, Sentinel, QRadar, LogRhythm, Splunk), EDR (Microsoft Defender, FireEye, Tanium), IDS/IPS, firewalls, proxies, web application firewalls, anti-virus, etc
• Comprehensive understanding of Window Security Event logs and Syslog

Excellent familiarity with endpoint/perimeter security attack vectors and detection (blue/purple teaming)

Excellent familiarity with standard security frameworks such as MITRE, cyber kill chain and APT campaign strategies

Outstanding knowledge of cloud platforms such as Azure, O365, Google cloud, AWS, Oracle

Experience with modern SIEM platforms, including cloud-native or hybrid solutions

Hands-on experience with CI/CD pipelines and automation tools for security content deployment

Proficiency in version control systems (e.g., Git) for managing SIEM content

Excellent working knowledge of regular expression development

Scripting and programming experience is highly desirable

Kusto or SQL knowledge, including rule/query optimisation

Proven ability to prioritise workload, meet deadlines and utilise time effectively

Good interpersonal and communication skills, works effectively as a team leader and the ability

Experience in security event analytics, for example Elastic, Azure Sentinel or Splunk

Preferred:

• Demonstrable experience in critical thinking and data or logical analysis

Knowledge of: typical security devices such as firewalls, Intrusion detection system, anti-virus, anti-spam,

Cyber threat concepts e.g. cyber kill chain, attack methods, threat actors

Cloud systems and Windows and Linux OS

Experience with investigating intrusions in Linux and cloud environments

Must have technical and professional qualifications:

• 3 years or above related experience
• Excellent verbal and written communication skills
• Highly disciplined and motivated, able to work independently or under direction
• Deep understanding of threat actor techniques and tools
  
  
  

Not a perfect fit?

Worried that you don’t meet all the desired criteria exactly? At Vodafone we are passionate about empowering people and creating a workplace where everyone can thrive, whatever their personal or professional background. If you’re excited about this role but your experience doesn’t align exactly with every part of the job description, we encourage you to still apply as you may be the right candidate for this role or another opportunity.

What's In It For You

• Yearly bonus: 10%
• Annual leave: 28 days + bank holidays + the opportunity to buy/sell/carry over 5 days/year
• Charity days: 5 days/year
• Maternity leave: 52 weeks: the first 13 weeks are fully paid, followed by 26 weeks of half pay
• Private pension: You can contribute up to 5% of your basic pay with 2:1 matching from Vodafone up to 10%
• Access to: private medical, private dental, free health assessments, share save scheme
• Additional discounts: Vodafone retail, gym, cinema, cycle to work, season ticket loan
  
  
  

Who We Are

We are a leading international Telco, serving millions of customers. At Vodafone, we believe that connectivity is a force for good. If we use it for the things that really matter, it can improve people's lives and the world around us. Through our technology we empower people, connecting everyone regardless of who they are or where they live and we protect the planet, whilst helping our customers do the same.

Belonging at Vodafone isn't a concept; it's lived, breathed, and cultivated through everything we do. You'll be part of a global and diverse community, with many different minds, abilities, backgrounds and cultures. ;We're committed to increase diversity, ensure equal representation, and make Vodafone a place everyone feels safe, valued and included.

If you require any reasonable adjustments or have an accessibility request as part of your recruitm

ent journey, for example, extended time or breaks in between online assessments, please refer to https://careers.vodafone.com/application-adjustments/ for guidance.

Together we can.