Data Engineer (DV Security Clearance) in Chippenham

This job is with CGI, an inclusive employer and a member of myGwork – the largest global platform for the LGBTQ+ business community.

At CGI, you'll help protect critical systems by designing and operating data pipelines that enable real-time security insight across complex defence environments. Working on a secure programme, you'll take ownership of on-premise data ingestion and processing solutions that underpin a SIEM platform built on the Elastic Stack. You'll collaborate closely with security and infrastructure specialists, apply creative problem-solving to diverse log sources, and continuously improve how data is captured, enriched and analysed. Supported by experienced colleagues and trusted to make meaningful technical decisions, you'll deliver resilient, high-impact solutions that directly contribute to national security outcomes.

Your Future Duties And Responsibilities

• Design, build and maintain on-premise data ingestion and processing pipelines that feed a SIEM platform used for real-time security monitoring and analytics.
• Ensure critical log sources are reliably parsed, normalised and enriched, enabling high-quality data to support operational and security decision-making.
• Onboard new data sources, improve existing pipelines and help shape standards across the platform.
• Contribute to the long-term robustness and performance of the data platform by documenting designs, improving data flows and supporting operational teams through clear runbooks and shared knowledge.

Key Responsibilities Include:

• Design & build Logstash pipelines for ingesting data into Elasticsearch.
• Develop & manage Apache NiFi flows for routing, transformation and enrichment.
• Parse & transform diverse log formats including JSON, CEF, Syslog and Avro.
• Develop & optimise Python scripts for enrichment, automation and alerting.
• Collaborate & support security and IT teams to onboard new log sources.
• Document & maintain pipeline designs, data standards and operational runbooks.

Required Qualifications To Be Successful In This Role:

• 3+ years' experience in data engineering or a related development role.
• Proven hands-on experience with Elastic SIEM (Elasticsearch, Logstash, Kibana).
• Strong experience working with log formats such as JSON, CEF, Syslog and Avro.
• Proficiency in designing and optimising data flows in large-scale environments.
• Strong Python skills for data processing, enrichment and automation.
• Ability to prioritise work independently and contribute proactively.
• Willingness to obtain, or hold, MOD high-level security clearance.

Desirable Experience:

• Experience with Apache NiFi data flow design and management.
• Knowledge of containerisation tools such as Kubernetes.
• Experience scaling and tuning Elasticsearch clusters.
• Familiarity with Windows event logging and syslog collectors.
• Good understanding of Linux system administration and network protocols.

Together, as owners, let's turn meaningful insights into action. Life at CGI is rooted in ownership, teamwork, respect and belonging. Here, you'll reach your full potential because you are invited to be an owner from day 1 as we work together to bring our Dream to life. That's why we call ourselves CGI Partners rather than employees. We benefit from our collective success and actively shape our company's strategy and direction. Your work creates value. You'll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities to scale your ideas, embrace new opportunities, and benefit from expansive industry and technology expertise. You'll shape your career by joining a company built to grow and last. You'll be supported by leaders who care about your health and well-being and provide you with opportunities to deepen your skills and broaden your horizons. Come join our team-one of the largest IT and business consulting services firms in the world.