Senior Complex Systems Engineer / Consultant – Underwater Complex Systems

BMT; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Private Medical (family)

Enhanced Pension

26 Days Annual Leave

Holiday Trading

Retail Vouchers

Professional Subscriptions

Job summary

BMT seeks a Senior Complex Systems Engineer / Consultant – Underwater Complex Systems to lead delivery across submarine combat systems. You will operate within a specialist team, shaping delivery approaches and managing risks to ensure on-time, within-budget outcomes.

You will collaborate with Project Managers and stakeholders to sustain in-service capabilities and explore new non-defence underwater system domains. Flexible/hybrid working is available where possible.

Qualifications

• UK-born sole national with five years of UK residency.
• Ability to obtain and maintain full UK security clearance.
• Experience in defence, naval or underwater systems engineering environments.
• Strong communication and analytical skills.

Responsibilities

• Deliver high-quality engineering support across submarine combat systems and underwater complex systems.
• Collaborate with Project Managers to shape delivery approaches, identify and mitigate risks, and develop robust project plans.
• Ensure effective stakeholder engagement and communication at all stages of project delivery.
• Support sustaining in-service capabilities and development of next-generation complex system solutions.

Skills

IEng qualification pursuit

Security clearance experience

Defence/Naval systems

Project delivery & risk mgmt

Education

Incorporated Engineer (IEng) or equivalent

Level 5 or higher Engineering qualification

Job description

Senior Complex Systems Engineer / Consultant – Underwater Complex Systems

Department: Technical Capability

Employment Type: Full Time

Location: United Kingdom

Reporting To: Mick Dewhirst

Description

Job Title: Senior Complex Systems Engineer / Consultant – Underwater Complex Systems

Contract Type:

Flexibility: This role is available part-time, job-share or full time. This is because we want the best people for our roles, and we recognise that sometimes those people aren’t available full-time.

Location: In terms of location, we have offices in London, Bath, Bristol, Weymouth, Glasgow or Fareham and we are happy to explore flexible and hybrid working arrangements.

Eligibility for this Role To be considered for this position, applicants must meet the following criteria:

• Be a UK-born 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.

About BMT

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. Committed to creating a safer, more efficient, effective, and sustainable future, BMT values diversity, equity, and inclusion, recognisng their pivotal role in achieving our business purpose. Learn more about BMT at www.bmt.org.

At BMT, we pride ourselves on being a verified flexible workplace, providing freedom and choice. We understand not everyone has the same needs in order to make work work for them and their lives - we'd love you to discuss any requirements for flexibility with us - we can't promise to fulfil every request but we do promise to listen to what matters to you. Learn more about our flexible status at Flexa Careers.

Why Work for 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, including:

• 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

About The Role

As a Senior Complex Systems Engineer (Grade 4), you will play a key role in delivering high‑quality engineering support across submarine combat systems and mission‑critical underwater complex systems. You will operate within a specialist team of Mission and Complex Systems engineers and consultants, contributing to the successful delivery of engineering projects or sub‑projects of varying scope, scale, and technical complexity.

Working both independently and as part of multi‑disciplinary teams, you will be engaged throughout the full lifecycle of customer delivery. You will collaborate closely with Project Managers to shape delivery approaches, identify and mitigate risks, develop robust project plans, and monitor and report progress against agreed schedules. You will also help to ensure effective stakeholder engagement and communication at all stages of project delivery.

In partnership with our customers, you will support the achievement of key project milestones and deliverables, particularly in relation to sustaining in‑service capabilities and developing the next generation of complex submarine combat system solutions.

Drawing on BMT’s extensive experience in defence‑related engineering, including the management and operational employment of advanced submarine combat systems, you will also contribute to the expansion of our consultancy and engineering services into emerging non‑defence underwater complex system domains.

About You

You’re an enthusiastic team player with a strong passion for your area of expertise. You bring demonstrable experience and specialist knowledge in the operation and support of complex submarine combat systems or other complex underwater mission systems. Ideally you will have knowledge and experience in the design, procurement, delivery into service and support of complex submarine combat systems, along with a solid understanding of MOD business processes relevant to combat and mission systems engineering.

You’re an articulate, informed, and persuasive communicator who exercises diplomacy and discretion when engaging with others—both internally and externally. You have a sharp analytical mind, able to quickly interpret complex data and use insights to identify options, make sound recommendations, and support robust, defendable decisions.

You will have actively maintained knowledge in the submarine Combat Systems area. You will be competent enough to provide detailed and specific advice regarding the application of your specialized area to both BMT internal stakeholders and our customer base.

Technical Competencies

• Comprehensive technical and/or Operational understanding of, Command, Control, Communications, Combat and Mission enabling systems.
• Preferably experienced on UK RN submarine/surface platforms.
• Familiar with other complex systems such as Platform Management Systems and understanding of computer networks architecture.
• Knowledge (desirable Thorough) of the engineering artefacts required throughout the MOD CADMID lifecycle.

Qualifications & Experience

• Incorporated Engineer (IEng) or working toward with ability to achieve in 18 months.
• Level 5 or higher Engineering qualification (or equivalent experience).
• Experience in defence, naval or underwater systems engineering environments. Basic (desirable Thorough) understanding of the defence procurement policy, process and procedures.
• Basic (desirable Thorough) knowledge of the MOD/SDA stakeholders and industry suppliers.