Senior Systems Engineer

MOTT MACDONALD; United Kingdom; On-site; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Private medical insurance

Life assurance

Generous holiday entitlement

Employee ownership

Job summary

Mott MacDonald is recruiting a Senior Systems Engineer within the Nuclear; Defence and Civil division. The role focuses on leading workshops, developing system architectures, and delivering key SE artefacts to meet project timelines.

You will work with clients, designers, and multi-disciplinary teams, ensuring robust requirements management and interface control across regulated environments. UK Security Clearance is required for eligibility.

Qualifications

• Strong understanding of systems engineering techniques across the lifecycle.
• Proven ability to manage stakeholders and communicate complex concepts clearly.
• Experience with MBSE and architectural development against an Architectural Framework.
• Knowledge of system integration, test, evaluation and acceptance strategies.

Responsibilities

• Lead stakeholder workshops and define the system boundary and concept of operations.
• Develop and manage system requirements throughout the lifecycle using appropriate tools.
• Create system architectural views (functional, physical) and identify interfaces.
• Produce technical artefacts for reviews and client deliverables; mentor junior staff.

Skills

Systems engineering

Stakeholder management

MBSE

Requirements development

Communication

Education

Degree in technical discipline

Tools

DOORS

Sparx EA

Job description

Location/s: Tadley, Bristol, London, Glasgow, Altrincham; UK

Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices.

We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance – we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.

Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you're surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued. Whatever your ambition, Mott MacDonald is where people come to be brilliant.

About thebusinessunit

The Energy unit delivers services to clients globally across several sectors including hydropower, nuclear, waste, renewable generation and transmission & distribution networks. Together we provide integrated engineering and project management services across the project lifecycle – from concept and design to construction and operations, to decommissioning or repowering and life extension. Together with our clients, we're helping to deliver the energy transition globally.

Overview of the role

Our Nuclear; Defence and Civil division is looking for a Senior Systems Engineer. This role involves working closely with clients, designers, other systems engineers. You will lead stakeholder workshops, develop system architectures, and will be expected to meet deadlines set for key systems engineering deliverables, including:

• Project Systems Engineering Management Plan (SEMP)
• Requirements and Acceptance Management Strategy (RAMS) & Plan (RAMP)
• Interface Management Plan
• System Requirements Specification
• System Architecture Description
• System/ Subsystem Design Descriptions
• Interface Control Documents
• System Integration Management Plan

Our team provides a range of key services, including:

• Requirements Management
• System Architecture Development and Modelling
• Technical Interface Management and System Integration
• Design Assurance, Verification, and Validation Management
• Configuration Management

Key responsibilities and duties include:

• Influence, capture and translate stakeholder vision and define the scope and boundary of the system, along with its Concept of Operations
• Propose, develop and manage system requirements throughout the system lifecycle, using an appropriate requirements management tool
• Develop all required system architectural views (functional and physical), including, but not limited to Functional, System and Spatial Breakdown Structures
• Apply appropriate scenario modelling and role modelling techniques to contribute to capability assurance evidence
• Work with designers to define internal and external system technical interfaces
• Identification and management of technical assumptions, dependencies and constraints
• Develop and review systems engineering artefacts, as necessary, to support technical reviews and client deliverables
• Generate and manage objective Verification & Validation evidence
• Support configuration management of the system design baseline and contribute to impact assessments and management of technical change
• Organise and lead stakeholder workshops, defining metrics and acceptance criteria
• Communicate complex technical content clearly to stakeholders at all levels and collaborate effectively across multi-disciplinary engineering teams
• Produce high quality technical reports, presentations and project artefacts as required by company processes and project delivery
• Support and mentor junior staff, overseeing task supervision and professional development

Candidate specification

Essential:

• Strong understanding of systems engineering techniques applied across the entire engineering lifecycle, with demonstrable experience in a significant portion of the lifecycle
• Strong stakeholder management skills with the ability to communicate complex concepts clearly
• Strong background in requirements development, preferably for infrastructure projects
• Knowledge and experience in applying a Model-Based Systems Engineering (MBSE) approach, including system architecture development against an Architectural Framework
• Knowledge of System Integration, Test, Evaluation and Acceptance strategies
• Proficiency in use of typical systems engineering toolsets, e.g. for requirement management (DOORS, or similar) and architecture definition (Sparx EA, or similar)
• Excellent written communication skills with a methodical, detail-focused approach
• Preferably experience in infrastructure projects and ideally the nuclear sector. However, experience in developing complex systems in any highly regulated, multi-disciplinary engineering industry is valued
• Degree level qualification, or equivalent, in a technical discipline
• Preferably professionally registered as an engineer, or willing to work towards

Due to the sensitivity of some of our projects, candidates will be required to apply for and obtain UK Security Clearance.

UK Immigration

Mott MacDonald Ltd. are not currently offering sponsorship to candidates under the Skilled Worker visa route in the UK. This decision is as a consequence of the changes made to the Skilled Worker route by the UK Government in April 2024. We continue to welcome applications from candidates who are eligible for alternative immigration routes in the UK, that does not require sponsorship as a Skilled Worker now or in future.

Agile working

At Mott MacDonald, we believe it makes business sense for you and your manager to choose how you can work most effectively to meet your client, team, and personal commitments. We offer a hybrid working policy that embraces your well-being, flexibility, and trust.

Equality, diversity, and inclusion

We put equality, diversity, and inclusion at the heart of our business, seeking to promote fair employment procedures and practices to ensure equal opportunities for all. We encourage individual expression in our workplace and are committed to creating an inclusive environment where everyone feels they can contribute.

AI Usage

At Mott MacDonald, we see the value AI can bring, but we take a people-first approach to hiring. While AI tools can help candidates prepare and build confidence, every application and hiring decision is reviewed by our recruitment and hiring teams. We encourage the responsible use of AI while ensuring we get to know the real person behind the application.

Accessibility

We want you to perform your best at every stage in the recruitment process. If you are disabled or need any support to enable you to apply or attend an interview, please contact us at [e-mail] and we will talk to you about how we can support you.

We offer some fantastic benefits including:

Financial wellbeing

• We match employee pension contributions between 4.5% and 7%.
• Life assurance equal up to 4 x your basic salary, with an option to increase the level of cover to 6 x your salary.
• Our income protection scheme provides a financial benefit, as well as absence and return to work support due to long-term illness or injury.
• Flexible benefits, including increased life assurance cover, critical illness insurance, payroll saving and will writing.
• As an independently owned business we share the financial success of the business with all our colleagues in various ways including annual bonus schemes.

Employee Ownership

• Our employee ownership model means no external investors, just us, creating a culture of shared success.
• Our employees have a stake and a voice in our business, giving them a direct connection to our success through our personal and group performance bonuses.
• As your career grows, so does your stake, recognising your long‑term impact and contribution.
• Your voice matters, with the opportunity to connect directly with senior leadership through formal channels to help shape our future.
• For our senior roles you will have a direct pathway towards ownership from day one.

Health and wellbeing

• Private medical insurance for all UK colleagues.
• Health cash plan to support you with every day health costs and treatments.
• Access to Peppy, providing free support from menopause experts for all UK colleagues.
• A variety of wellbeing support is available through our comprehensive wellbeing program, including access for you and your family.
• Ability to flex your salary to opt into a wide range of health benefits, many of which can be extended to your family too.

Lifestyle

• A minimum of 33-35 days holiday each year, inclusive of public holidays and dependent on level, with the ability to buy or sell leave through our flexible benefits programme.
• 10 days additional paid leave for Armed Forces Reservists and Cadet Force Adult Volunteers.
• Holiday entitlement increased to a minimum of 35 days after 5 years' service.
• Variety of employee saving schemes and discounts from high-street retailers.

Enhanced family and carers leave

• Enhanced family leave policies, including 26 weeks paid maternity and adoption leave, and two weeks paid paternity/partner leave.
• Our shared parental leave matches maternity leave meaning we pay up to 24 weeks at full pay.
• Up to five additional days leave are provided for those with significant caring responsibilities, two of which are paid.
• We offer policies and dedicated support to help military families balance service life with career and wellbeing.

Learning and development

• Primary annual professional institution subscription.
• A broad range of opportunities to enhance both technical and soft skills through mentoring, formal training, and self-development options.

Networks, communities, and social outcomes

• Join a wide range of groups including our Advanced Employee Networks which support our LGBTQ+, gender, race and ethnicity, disability, and parents/carers communities.
• We are proud signatories of the Armed Forces Covenant and Gold Award holders in the MOD Employer Recognition Scheme, supported by our dedicated internal Armed Forces Network.
• Make a difference within our communities through our social outcomes.