Senior ML Engineer

Contract Type: Permanent

We are happy to explore flexible and hybrid working arrangements. Please note that travel to customer sites or to attend meetings will be required.

• Be a UK sole national.
• Have held no other nationality at any time.
• Have continuously resided in the United Kingdom for the past five years.
• Be able to obtain and maintain full UK security clearance in accordance with government vetting standards.
• Provide satisfactory evidence of identity, nationality, and residency as part of the clearance process.

Department: Technical Capability

Location: UK – Bath

Job Title: Senior ML Engineer

BMT is dedicated to tackling the most crucial engineering challenges of our era, fostering an environment where individuals with exceptional technical expertise provide meaningful, practical solutions. We commit to creating a safer, more efficient, effective, and sustainable future. BMT values diversity, equity, and inclusion, recognizing their pivotal role in achieving our business purpose. Learn more about BMT .org. We pride ourselves on being a verified flexible workplace, providing freedom and choice.

We understand not everyone has the same needs to make work work for them and their lives – we'd love you to discuss any requirements for flexibility with us.

Joining BMT means gaining access to a comprehensive set of employee benefits designed to empower your success. In addition to a competitive salary, our offerings encompass health, family, finance, and personal development.

• Private Medical (family coverage)
• Enhanced Pension
• 18 weeks enhanced maternity pay (after a qualifying period of 1 year)
• Family friendly policies
• Committed to an inclusive culture
• Wellbeing Fund – an annual fund for personal hobbies or interests
• 26 Days Annual Leave (plus bank holidays)
• Holiday Trading
• Retail Vouchers
• Professional Subscriptions

We are seeking an experienced Senior ML to join our team and engage in a diverse range of client projects within the defence, national security, and commercial sectors. At BMT we accelerate our business through informed and targeted application of ML and LLMs.

As a Senior ML Engineer, you will be responsible for:

• Design, build, and deployment of machine‑learning systems, applying robust software engineering practices and an in‑depth understanding of model behaviour, performance, and limitations.
• Select, prepare, and pipeline data for model training and inference. Implements, trains, evaluates, and optimises machine‑learning models, continually improving them through iterative experimentation and additional data.
• Create scalable and automated ML pipelines, including feature extraction, model training, validation, packaging, deployment, and monitoring.
• Design and implement dashboards, diagnostics, and evaluation tooling to ensure transparency, performance tracking, and operational reliability across the ML lifecycle.
• Within defined delivery goals, refine prototype models into production‑ready components, contributing to development, optimisation, demonstration, and integration activities.
• Apply standardized engineering and evaluation methods, producing clear technical documentation and communicating design choices, performance outcomes, and limitations.
• Contribute to internal knowledge bases and participate in professional ML engineering communities.
• Ensure responsible handling of data throughout the ML lifecycle, including secure storage, access control, data lineage, versioning, and quality checks.
• Evaluate data integrity and suitability for ML workflows, and advise on transformations, feature representation, and schemas needed for efficient training and inference.
• Implement metadata standards, reproducible data pipelines, and automated validation procedures to maintain trustworthy data assets.
• Design, develop, test, document, and maintain moderately complex machine‑learning services, APIs, and supporting software.
• Write well‑structured, maintainable code using agreed standards and tools.
• Apply engineering‑focused data modelling and system design techniques to create, modify, or maintain ML‑relevant data structures, feature stores, and…