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ASSYSTEM

Engineering services for design, construction, commissioning

Principal Layout Integration Engineer

Design EngineeringConfirmed live in the last 24 hours
Full-timeBristol, UKNo salary listedHybrid

About the Job

Requirements

  • Degree qualified in Mechanical Engineering or related discipline, or equivalent industrial experience.
  • Extensive experience in plant layout, piping layout, plant integration and multidisciplinary engineering delivery.
  • Experience leading complex engineering studies and technical decision-making.
  • Strong understanding of systems engineering principles, requirements management and interface management.
  • Strong understanding of constructability, maintainability, modularisation and lifecycle considerations.
  • Experience leading multidisciplinary teams, workshops and design reviews.
  • Experience supporting major design reviews, technical governance activities and engineering assurance processes.
  • Experience using E3D, PDMS, Plant 3D, Siemens NX, Revit, Inventor and Navisworks, or equivalent platforms.
  • Excellent report writing, presentation and stakeholder management skills.
  • Proven ability to influence senior stakeholders, clients and project teams.
  • Ability to define engineering strategy whilst remaining engaged in technical delivery.
  • SC Clearance or capable of achieving it.

Responsibilities

  • Lead plant layout development from concept through detailed design for complex facilities and plant areas.
  • Act as technical lead for major buildings, systems or programme-level integration activities.
  • Lead development of equipment, piping, cable tray, access and maintenance arrangements.
  • Lead piping routing studies and layout optimisation activities.
  • Provide technical leadership across multiple projects and programmes.
  • Lead requirements-driven layout development and multidisciplinary integration activities.
  • Define layout integration methodologies, standards and engineering approaches.
  • Lead major optioneering, constructability, modularisation and plant integration studies.
  • Lead complex multidisciplinary reviews and technical workshops.
  • Provide technical assurance and review of layout deliverables.
  • Lead resolution of complex layout, routing, requirements and integration challenges.
  • Ensure layout solutions satisfy operational, safety, constructability and lifecycle requirements.
  • Support bids, proposals and client engagement activities.
  • Develop layout standards, procedures and best practice guidance.
  • Mentor engineers and support capability development.
  • Support recruitment, succession planning and capability growth.
  • Author and review technical reports, engineering strategies and client-facing documentation

Desired Qualifications

  • Experience within the nuclear, fusion, SMR or AMR sectors.
  • Experience supporting business development and client-facing activities.
  • Experience developing engineering standards, methodologies and governance processes.
  • Candidates able to demonstrate experience through technical leadership, engineering decision-making and delivery of complex engineering projects are encouraged to apply

About the Company

ASSYSTEM

Engineering services for design, construction, commissioning

Assystem provides engineering services for complex projects, covering design, construction, supervision, commissioning, and operation, with a strong focus on the nuclear and energy sectors. Its approach combines multidisciplinary engineering teams and project-management capabilities to move projects from initial concept through to operation. The company differentiates itself through a long track record, strategic acquisitions (including Alphatem in 1995 and Mactech Energy Group in 2025) and an early public offering in 2013, which have expanded its capabilities and market reach in the energy and nuclear fields. Its goal is to be a leading, reliable partner for clients by delivering end-to-end engineering services and helping them meet safety, performance, and regulatory requirements across the project lifecycle.

Company size
5,001-10,000
Company stage
IPO
Headquarters
Paris, France
Founded
1966

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