Senior Systems Engineer

Description:

Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees in more than 50 countries and 140+ offices. The company delivers projects across diverse sectors, including energy, infrastructure, and civil engineering, with a focus on innovation and societal impact.

As a proudly employee-owned business, Mott MacDonald invests in its people to create an environment where individuals feel empowered, included, and valued.

Business Unit Overview:

The Energy Unit provides integrated engineering and project management services across the project lifecycle – from concept and design to construction, operations, and decommissioning. The Nuclear, Defence, and Civil division is a key part of this, supporting global clients on energy transition projects.

Role Overview:

The Senior Systems Engineer will work closely with clients, designers, systems engineers, and interface managers to deliver high-quality systems engineering for complex projects. The role includes leading stakeholder workshops, defining system interfaces, managing multiple system deadlines, and producing critical deliverables such as:

• User Requirements Document

• Systems Engineering Management Plan (SEMP)

• Requirements and Acceptance Management Strategy & Plan (RAMS & RAMP)

• Concept of Operations (CONOPS)

• Integrated Test Evaluation and Acceptance Strategy & Plan (ITEAS & ITEAP)

Key Responsibilities:

• Develop, propose, and validate system requirements, addressing project knowledge gaps

• Lead stakeholder workshops, defining metrics and acceptance criteria

• Define internal and external system interfaces with designers and Interface Managers

• Develop and review systems engineering artefacts

• Capture and translate stakeholder vision into system and sub-system requirements

• Use requirements management software to manage requirements efficiently

• Communicate complex technical content clearly at all levels

• Conduct domain-specific analyses from system to component level

• Develop Concept of Operations and system architectures (functional and physical)

• Validate User Requirements and manage Verification & Validation evidence

• Produce high-quality technical reports, presentations, and project artefacts

• Mentor junior staff and oversee task supervision

Candidate Specification – Essential:

• Strong understanding of systems engineering tools and techniques (functional modelling, Function Means Analysis, decision analysis)

• Stakeholder management skills with clear communication of complex concepts

• Experience in requirements development and validation for infrastructure projects

• Knowledge of model-based systems engineering (MBSE) and system architecture development

• Expertise in Integrated Test Evaluation and Acceptance strategies

• Proficiency in Microsoft Word and system architecture tools (e.g., Visio, Sparx EA)

• Excellent written communication with attention to detail

• Experience in infrastructure projects; nuclear sector experience preferred

• Role requires appropriate Security Clearance

Work Pattern:

Full-time, permanent, with hybrid working options available

Benefits:

Health and Wellbeing:

• Private medical insurance, health cash plan, menopause support via Peppy

• Access to comprehensive wellbeing programmes for employees and families

Financial Wellbeing:

• Matched pension contributions (4.5%–7%), life assurance, income protection

• Flexible benefits including bonus schemes, critical illness cover, and will writing

Lifestyle & Leave:

• 33–35 days holiday inclusive of public holidays, with ability to buy/sell leave

• Holiday entitlement increases after 5 years of service

• Employee discounts and saving schemes

Family & Carers Leave:

• Enhanced maternity/adoption leave (26 weeks), paid paternity/partner leave, shared parental leave

• Additional days for significant caring responsibilities

Learning & Development:

• Professional subscriptions, mentoring, training, and self-development opportunities

Networks & Social Impact:

• Employee networks supporting LGBTQ+, gender, race, disability, and parents/carers

• Opportunities to contribute to social outcomes and community projects