Senior Systems Engineer in Portsmouth

SubSea Craft is a fast growing, privately‑funded, UK‑based innovative maritime technology company specialising in next‑generation, high‑performance watercraft and systems. We operate at the intersection of advanced engineering, cutting‑edge design, and user‑centric innovation, delivering safe, effective, and enabling solutions for both commercial and defence applications.

What we offer:

• Pension Contribution – Pension scheme with the option to contribute via salary sacrifice.
• Annual Bonus Scheme – Eligibility to participate in the company’s annual discretionary bonus scheme, linked to individual and company performance.
• Life Assurance and Critical Illness Cover – Comprehensive protection including Life Assurance (4x salary) and Critical Illness Cover for added financial security.
• Annual Leave – Entitlement to 25 days of annual leave plus bank holidays.
• Christmas Leave – A Christmas shutdown is typically observed.
• Wellbeing Day – An additional Wellbeing Day each year to focus on personal health and wellbeing.
• Family Leave – Enhanced maternity and paternity pay.
• Private Healthcare – Access to comprehensive private healthcare coverage to support your physical and mental wellbeing.
• Professional Development – Commitment to ongoing learning and career growth, supported by training programmes and access to LinkedIn Learning.
• Flexible Working – Opportunities for flexible working arrangements to promote work‑life balance.
• Inclusive Culture – A professional environment that values diversity, innovation, and collaboration.

Role Overview:

We’re looking for a technically strong Senior Systems Engineer to lead the design, development, and integration of subsystems within our advanced maritime platforms. You’ll take ownership of key technical workstreams, ensuring robust architecture, clear interfaces, and integration readiness within defined scope. Reporting to the Lead Systems Engineer, you’ll collaborate across disciplines to deliver reliable, well‑engineered solutions that meet system‑level requirements. This role is ideal for an experienced systems engineer who thrives on deep technical engagement, enjoys coordinating across functions, and takes pride in delivering clarity and quality within complex, multi‑domain environments.

Responsibilities will include:

• Own subsystem or domain‑level architecture, requirements, and integration planning.
• Deliver clear, traceable definitions of interfaces, behaviours, and verification plans.
• Act as the technical lead for your workstream, coordinating across mechanical, electrical, software, and control teams.
• Drive subsystem integration readiness by managing dependencies and resolving technical blockers.
• Support system‑level verification through detailed test planning and analysis.
• Identify and manage technical risks within your domain, escalating cross‑cutting issues to the Lead Systems Engineer.
• Engage regularly with internal stakeholders to ensure alignment and delivery focus.
• Contribute to technical reviews and assurance activities within your engineering domain.
• Support the development of junior engineers through knowledge sharing and peer review.

Qualifications and Experience Required:

• Degree in Systems Engineering, Electrical/Mechanical Engineering, or a related field, or equivalent experience.
• 4–7 years’ experience in systems engineering within complex, regulated, or safety‑critical environments.
• Strong understanding of systems architecture, requirements management, and integration planning.
• Proven experience leading technical delivery within a defined scope or subsystem.
• Skilled in interface definition, cross‑discipline coordination, and design assurance.
• Excellent communication and collaboration skills in multi‑disciplinary teams.

Desirable:

• Experience with class approval processes (e.g. Lloyd’s, DNV) or other compliance regimes.
• Proficiency with MBSE tools and practices (e.g. SysML, Cameo).
• Familiarity with Jira, Confluence, and modern digital collaboration tools.
• Exposure to staged integration, TRL‑based delivery, or platform qualification efforts.

Note: Due to the nature of work undertaken at SubSea Craft, the selected candidate must be capable of meeting the security requirements of the position, which would include as a minimum existing right to live and work in the UK, Baseline Personnel Security Standard (BPSS), with UK National security clearance required for certain roles. Please note that all offers of employment are conditional and subject to satisfactory DBS, driving licence and reference checks. A criminal record will not automatically disqualify candidates from employment. We will consider criminal record information alongside the wider range of evidence gathered at the application, interview, and pre‑employment checking stages.

Values: Our people are our greatest asset, we continually strive to provide an excellent working environment to enable our team to do their best work. We have an agile professional workforce: we are founded on the belief that our people are valued and our business is trusted, inclusive and commercially adept.

What we expect from you:

• Teamwork, mutual respect and collaboration
• Initiative and independent working
• Honesty and integrity
• Business and commercial awareness
• Agility, adaptability and continuous development

We are committed to building an inclusive, diverse workplace where everyone can thrive. If you require any support or adjustments to interact with us, please let us know.