SIEM Application Engineer

Job Description

Job Title:

SIEM Application Engineer

Req

Job Function:
Cyber Security

Posting

Start Date:

09/09/2026

Posting End Date: 23/09/2026

Division:
Networks

Job Location:

G
-Birmingham-Three Snowhill

Advertised Salary:
Competitive with Great Benefits

Job Req

Posting Date: 9th Sep 2026

Closing Date: 23rd Sep 2026

Location:

Birmingham

The new Network SIEM is essential to BT’s network security, meeting TSA requirements and improving our CAF level. Your role as a SIEM Application Engineer in Security Engineering is to support the development, implementation, operation and support of BTs Strategic SIEM development.

We are seeking a skilled SIEM Security Engineer with expertise in SIEM and Security logging and monitoring to join our dynamic team. As a SIEM engineer, you will play a critical role in designing, developing, and maintaining the ingestion of our security information and event management (SIEM) system. Your focus will be on leveraging Elasticsearch and related technologies to enhance threat detection, incident response, and overall security posture.

This role is based in BT's Birmingbam office & requires 3 days in office

• Data Ingestion and Enrichment:
  • Configure Elasticsearch pipelines for data ingestion from various sources, primarily from Kafka
  • Enhance data enrichment by integrating threat intelligence feeds and contextual information.
• SIEM Solution Development:
  • Collaborate with security analysts and architects to design and implement SIEM solutions using Elasticsearch.
  • Optimize SIEM rules, alerts, and dashboards for efficient threat detection.
• Query Optimization and Performance Tuning:
  • Write efficient Elasticsearch queries to retrieve relevant security events.
  • Monitor and manage the performance of the SIEM infrastructure.
• Security Engineering:
  • Contribute to security engineering projects, transitions, and transformations.
  • Work closely with security operations and associated security incident response systems
  • Stay informed about emerging threats and security best practices.

• Proven experience in Software Engineering roles
• Experience in some of the following technologies:
  • Scripting
  • Kubernetes
  • Elasticsearch - Logstash
    -Kibana
  • Kafka
  • ArgoCD
  • Gitlab pipelines
  • YAML
  • Helm
  • Ansible
  • Basic networking
• Strong analytical and troubleshooting skills
• Willingness to learn new technologies
• Attention to detail

• Experience in SIEM Detection Engineering.
• Experience with log source onboarding and normalisation
• Knowledge of Linux, Windows and Network Administration
• Knowledge and experience of cloud services (public or private), Open Stack and K8S
• Devops practices

• 10% on target annual bonus
• Access to an online private GP 24/7 for you and your immediate family
• Market-leading paid carers leave with up to 2 weeks off
• Equalised maternity, paternity, and adoption leave – 18 weeks’ full pay and 8 weeks’ half pay
• Discounted EE and BT products, including mobile and broadband
• Market leading Pension scheme – 5% from you and 10% from us
• Holiday purchase scheme

You can select additional benefits, including healthcare, dental, gym memberships and more when you’re ready.

BT Group is the UK’s leading communications group and the holding company behind some of the country’s most recognised brands – including BT, EE, Openreach and Plusnet. Our purpose is as simple as it is ambitious: we connect for good. Our customers include consumers, small, medium and large businesses, public sector organisations and other communications providers.

BT Group’s role is about setting direction, unlocking value and creating the conditions for our brands and businesses to thrive.

Having come through the most capital-intensive phase of our fibre investment, our focus now is on…