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ASSYSTEM

Engineering services for design, construction, commissioning

Test Engineer

Building Services EngineeringConfirmed live in the last 24 hours
Full-timeLyon, France€36k - €50k /yr

About the Job

Requirements

  • A Bac +5 engineering degree, either in general engineering or with a specialization in mechanical engineering.
  • Three to five years of initial experience in the nuclear field.
  • Experience or skills in fluid, electrical, HVAC, and I&C testing, flushing, preservation, and integrated testing.
  • Project management, industrial strategy, data analysis, and technical writing skills.
  • Autonomy, rigor, pragmatism, curiosity, and organizational skills.

Responsibilities

  • Optimize and plan tests, analyze feedback and lessons learned, and define test sequences.
  • Define system test strategies and validate the testability of installations.
  • Prepare commissioning activities on site, including identifying test resources, utilities, and temporary networks.
  • Integrate commissioning requirements into contracts and support suppliers on testing matters.
  • Contribute to test digitalization by developing tools and formalizing processes.
  • Produce technical deliverables related to testing, commissioning, and planning.
  • Lead and coordinate commissioning activities, particularly for fluid, HVAC, electrical, and control-command systems.
  • Facilitate technical interfaces and participate in system reviews to ensure design compliance and testability.
  • Secure site activities by defining and monitoring contractual requirements related to testing.

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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