Full-Time
Site Security and Protection Design Engineer
ASSYSTEM
5,001-10,000 employees
Engineering services for design, construction, commissioning
Compensation Overview
€36k - €50k/yr
Lyon, France
Hybrid
Hybrid role based in Lyon, with occasional travel up to twice monthly, mainly to Île-de-France, eastern France, and southeastern France.
 Security & Protective Services |
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- At least 5 years of experience in the field.
- Knowledge of security systems and standard market solutions for access control, video surveillance, intrusion detection, and hypervision, including solutions such as Genetec, Milestone, Axis, Bosch, TIL, Nedap, Fichet, Honeywell, and Prysm.
- Knowledge of technical issues related to low-voltage systems and networks, including cabling, topologies, active equipment, and cabinets.
- Knowledge of information systems implementing client-server infrastructures, virtualization, high availability, encryption, and administration.
- Knowledge of physical protection principles for sensitive sites, including anti-intrusion and delay measures, security zoning, and flow analysis.
- Awareness of confidentiality and protection-of-secret requirements.
- Strong written and oral communication skills and the ability to work independently.
- Support clients in defining their needs for protecting sensitive sites.
- Conduct technical security audits to assess existing systems and identify vulnerabilities.
- Design suitable security architectures, from master plans through preliminary and detailed design phases.
- Participate in preparing consultation documents and technical specifications and in conducting consultations or calls for tender.
- Provide technical expertise in owner assistance and project-management assistance roles for infrastructure construction or renovation projects.
- Support construction monitoring, acceptance phases, and commissioning of installations.
- Advise project teams on market solutions and technological developments in the security field.
- Contribute to meeting the quality, security, and confidentiality requirements of sensitive environments.
- Experience within French civilian or military institutions, such as SID or DIRISI.
- CT-CERIC and/or CS-CERIC qualifications.
- Knowledge of industrial control-system cybersecurity, including protocols, standards and directives, ANSSI, NIS2, CRA, and IEC.
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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Simplify's Take
What believers are saying
- H1 2026 revenue reached €328.5 million, with 2.5% organic growth.
- Assystem won Rolls-Royce SMR momentum, plus GBE-N, MoD, and FRAM roles.
- Cotentin's 120 hires support Aval du Futur, targeting 10,000 jobs by 2028.
What critics are saying
- International revenue fell 7.1% in Q1 2026, hurt by India, Saudi Arabia, and currencies.
- Eighty-one percent nuclear concentration exposes Assystem to French and UK program slippage.
- Wylfa SMR or Aval du Futur delays would damage backlog, hiring, and margins.
What makes ASSYSTEM unique
- Nuclear made 81% of H1 2026 revenue, anchoring Assystem's specialization.
- June 24, 2026 CPS2 Tier 1 status embedded Assystem in UK nuclear procurement.
- Mactech's 2025 acquisition and 2026 Cotentin hiring deepened nuclear delivery capacity.
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Benefits
Health Insurance
Dental Insurance
Vision Insurance
Unlimited Paid Time Off
Flexible Work Hours
Remote Work Options
Paid Vacation
Paid Holidays
Hybrid Work Options
401(k) Retirement Plan
Wellness Program
Mental Health Support
Gym Membership
Professional Development Budget
Conference Attendance Budget
Stock Options
Company Equity
Phone/Internet Stipend
Home Office Stipend
Relocation Assistance
Childcare Support
Meal Benefits
Parental Leave
Family Planning Benefits
Fertility Treatment Support
Company News
Assystem reported consolidated revenue of €328.5 million for the first half of 2026, representing organic growth of 2.5% despite a 1.9% negative currency effect. The French engineering group's nuclear activities drove performance with 8.0% organic growth, accounting for 81% of total revenue. Revenue in France rose 4.2% organically to €201.1 million, led by strong momentum in nuclear new-builds and fuel cycle activities. International operations generated €127.4 million, remaining stable organically despite currency headwinds from the pound sterling, Indian rupee, and Saudi riyal. The UK showed robust growth in civil nuclear engineering and defence. However, business volumes declined in the Middle East, Central Asia region and India due to project endings and slower contract phasing. Assystem confirmed its full-year 2026 targets.
Assystem, an international engineering group, reported first-quarter 2026 consolidated revenue of €165.8 million, representing 2.2% organic growth driven by strong nuclear sector performance of 8.0%. Nuclear activities accounted for 81% of total revenue, up from 76% in the prior year. French operations grew 4.4% to €102.6 million, driven by momentum in fuel cycle activities, new-builds and digitalisation. International revenue declined 7.1% to €63.2 million, primarily due to a 6.0% negative currency effect from the pound sterling, Indian rupee and Saudi riyal. The UK showed robust growth in civil nuclear engineering and defence. Assystem secured key positions on government frameworks and its client Rolls-Royce SMR signed a contract with Great British Energy for three small modular reactors.
A global nuclear engineering firm has strengthened its UK presence with the acquisition of a specialist construction company. Paris-headquartered Assystem has… | North East | Construction | Engineering | International | Energy | Mergers & Acquisitions | Commercial Partnerships | Manufacturing & Construction |
Assystem, an international engineering, digital services and project management company, has acquired 100% of the shares of KEOPS Automation, a French company specializing in the integration of industrial operating platforms and the enhancement of their data (industrial OT and IT, automated systems, supervision systems, BI applied to manufacturing).
France-headquartered engineer and project manager Assystem has acquired India’s L&T Infrastructure Engineering, a subsidiary of the Larsen & Toubro group.