Senior Principal Systems Engineer — Hydrogen & Clean Energy

ALTEN LTD - UK; Horsham; Hybrid; GBP 75,000 - 110,000; Full time

Benefits offered by this job

Private Medical Insurance

Cycle & Tech Scheme

Employee assistance programme

Life insurance

Pension scheme

Team buildings

Flexible working

Job summary

ALTEN LTD - UK in Horsham is seeking a Principal Systems Engineer to lead architecture, integration, and governance for advanced fuel cell and electrolysis systems. You will drive system-level strategies across multiple programmes and mentor engineers, shaping technology roadmaps and industrialisation efforts.

The role requires deep expertise in electrochemical energy systems, thermo-fluids, and MBSE, with strong stakeholder engagement and leadership capabilities. Hybrid on-site work applies.

Qualifications

• Extensive experience in system design and integration of electrochemical energy systems.
• Deep understanding of thermo-fluids, electrochemistry, balance of plant systems, controls, and system dynamics.
• Proven ability to solve novel and complex system-level engineering challenges.
• Expertise in verification and validation methodologies, planning, and execution.

Responsibilities

• Act as the technical authority for system architecture, performance, and integration across multiple fuel cell and electrolysis programmes.
• Lead the development, review, and approval of system architectures, aligning with technical and commercial objectives.
• Provide technical governance across projects, including design reviews and risk management.
• Lead resolution of cross-functional system issues with significant business impact.
• Influence product roadmaps and technology strategies through system-level expertise.
• Develop and embed digital-first approaches to stack and system development.
• Lead verification and validation planning, execution, and interpretation.

Skills

System design

Electrochemical energy systems

System architecture

Verification & validation

Leadership

Stakeholder management

MBSE

Communication

Cross-functional collaboration

Technical mentoring

Education

Bachelor's in Engineering

Master's in Engineering

Equivalent military experience

Tools

MBSE tools

System modelling

Job description

ALTEN LTD - UK in Horsham is seeking a Principal Systems Engineer to lead architecture, integration, and governance for advanced fuel cell and electrolysis systems. You will drive system-level strategies across multiple programmes and mentor engineers, shaping technology roadmaps and industrialisation efforts.

The role requires deep expertise in electrochemical energy systems, thermo-fluids, and MBSE, with strong stakeholder engagement and leadership capabilities. Hybrid on-site work applies.