Infrastructure Engineering Specialist

Recruiter:
Lloyd Hughes Career Grade: D Closing Date: 31/07/2026

Due to the sensitive nature of this role, you will be required to undergo DV (Developed Vetting) level Security Clearance (). An allowance of £5k per annum may be payable monthly while you hold this DV and continue to work in a role that requires that level of security clearance. The terms of this allowance will be made available if you are successful in being recruited into this role.

Security isn’t always the first thing that comes to mind when you think of BT, but when it comes to keeping everyone safely connected, We Are The Protectors. We deal with thousands of cyber-attacks every day, so that millions of people can safely go about their daily lives and run their businesses. We deliver vital work at scale, with real breadth and impact.

We connect for good.

You’ll be joining a specialist security team that is a trusted partner to governments worldwide, protecting critical national infrastructure and committed to the safety and security of our nation and global communities. Our mission focused work is innovative, inspiring and technologically challenging in a way that makes every day different and stimulating. We provide the opportunity to work on rare projects, with exciting tools and brilliant people.

Everyone has access to unparalleled professional and personal development opportunities and your contribution is always valued.

Our team develop, maintain and operate big data platforms for one of our major customers. Comprised of big data storage platforms like Apache Hadoop and Ceph, Open Search and Elasticsearch, and a significant number of in‑house developed applications in pyspark, scala and other languages to simplify our user’s interactions with the platform. These are built on a large remote Linux (predominantly) estate.

The platform supports a suite of tools for storing, enriching, querying and visualising large amounts of data. The requirements can change at short notice, so the team uses a Dev Ops methodology to react to these changes and continue to provide the best customer service.

This role requires DV Clearance and will be onsite 5 days a week in either London or Ipswich.

• Responsible for 24 x 7 platform support including ongoing monitoring enhancements via scripting of custom tests and deployment/adaptation of built‑in monitoring.
• Manage project relationship with 24x7 monitoring teams both internal and external.
• Monitoring and tracking platform performance and power utilisation.
• Strong Communication skills working with individuals and teams at all levels (up to CTO and senior customers).
• Producing and delivering training for the platform support teams. Onboarding new members of the support team.
• Work closely with customers and internal stakeholders to plan outages and platform support & availability reporting including equipment and service upgrades whilst maintaining minimal if not zero outage deployments/upgrades.
• Production of monthly platform reports, tailored to customers evolving requirements.
• Ownership of thousands of assets across full lifecycle from order to decommissioning and destruction.
• Deliver future site expansion capability – Managing deliveries across multiple sites and building the hardware and software stacks to evolving designs.
• It is a requirement to work as part of the on call 24/7 rota, 1 week in 4.

• Excellent Communication skills.
• Ability to work to strict time constraints due to Customer priorities.
• Ability to multitask due to rapidly changing priorities.
• Server hardware installation/maintenance/management.
• Linux Admin (rocky).
• Proxmox (including HA and Ceph stores).
• (python/scala) Spark. Ceph and/or HDFS.
• Open Search/Elasticsearch cluster management. Operating system and firmware patching.
• Ability to critique design documents to improve outcomes or understand limitations where required.

• Network design/implementation (Cisco ASA/FTD and Dell OS10/SONIC).
• Check MK (nagios) administration and monitoring, including Nagvis and Business Intelligence (BI) development.
• Windows Domain Admin (server 2022+).
• MariaDB (multi‑site…