Optronics Engineer: Salary and Responsibilities in 2026

Seeing at night, detecting a drone several kilometres away, guiding a munition to its target, observing the Earth from a satellite: all these capabilities rely on optronics systems. The optronics engineer designs, develops and industrialises this equipment, which combines optics, electronics and signal processing to capture and exploit light, visible or infrared.

It is a specialist role, closely tied to defence, aerospace and space, where hiring often targets already experienced profiles. This page details the missions, skills, training, optronics engineer salary and career paths, based on Apec's job reference, SGDSN (French General Secretariat for Defence and National Security) texts, and the French metalworking industry collective agreement.

Job profile last updated on 26/09/2026.

Key takeaways

• Optronics combines optics, electronics and signal processing to capture, process and exploit images or light signals.
• The optronics engineer designs, tests and industrialises thermal cameras, sights, night vision systems, onboard sensors and observation instruments.
• Minimum Master's-level training: a Master's degree or specialised engineering degree in optics or optronics, sometimes a PhD. Apec indicates that 2 years of experience is frequently requested.
• Salary: according to Apec, 80% of the compensation offered in optics and optronics engineer job postings is between €35k and €53k gross per year, averaging €43k.
• In defence, some roles require national defence security clearance, requested by the employer depending on the position.

Optronics: what systems does the engineer work on?

The term optronics is a contraction of optics and electronics. An optronics system captures light radiation through an optical chain (lenses, mirrors, filters), converts it into a signal via a detector, then exploits it through signal and image processing.

Applications are numerous, and a large share relates to defence and security:

• Thermal cameras and night vision binoculars.
• Sights and fire control systems for vehicles, ships and aircraft.
• Laser designators and rangefinders.
• Infrared surveillance systems and threat detection, including drone detection.
• Space observation instruments onboard satellites.

According to Apec, in aerospace manufacturing, optics and optronics engineers develop onboard optical measurement and detection systems. The profession also exists in the automotive industry, scientific instrumentation, fibre optics and research institutes.

Why hire an optronics engineer?

Because the optronics system often concentrates an equipment's operational performance: it is what sees, detects and identifies. Any loss of sensitivity or resolution translates into reduced detection range.

The profession is evolving fast. Apec highlights the growing role of numerical simulation, which allows light propagation to be modelled and a system optimised without multiplying prototypes. It also cites the development of metamaterials, with applications notably in defence such as stealth. The optronics engineer must therefore maintain constant technology watch to stay current.

For a defence employer, hiring this profile also involves specific constraints: access to classified information, clearance timelines, export controls. These are all parameters to factor in from the moment the role opens.

What role does the optronics engineer play in the organisation?

The optronics engineer typically reports to an R&D manager or director, a team leader or a laboratory director. They work at the prime contractors and equipment suppliers of defence and aerospace, such as Thales or Safran Electronics & Defense, at specialised SMEs and startups, in engineering firms, or in public or private research institutes.

Their role may focus on design and R&D, testing, methods or manufacturing. Within a project, they interface with several areas of expertise: optical designers, electronics engineers, mechanical engineers for optomechanical integration, signal processing engineers and systems engineers.

What are the missions of an optronics engineer?

Apec's job reference describes 4 main areas of missions.

1. Designing optronics instruments

• Write the specifications for equipment, optical, optomechanical or optoelectronic systems.
• Design the instruments.

2. Testing and qualifying

• Build the modelling of optical and physical effects and run numerical simulations.
• Define measurement methods and test protocols.
• Carry out tests and handle the digital processing of measurements.
• Check that results comply with specifications.

3. Industrialising

• Lead industrial projects and feasibility studies.
• Supervise the building of prototypes and contribute to ramp-up to production.
• Transfer know-how to industrialisation teams, then provide support to production and after-sales service.

4. Sharing expertise

• Maintain technology watch and write technical documentation.
• Train teams and, in R&D, publish and present results at conferences.

With experience, some roles incorporate management: team supervision, budget management, or even defining new manufacturing lines.

What skills are needed to become an optronics engineer?

Technical skills

• Instrumental optics, optical design calculations, optical metrology, vision and image processing.
• Mastery of experimental work and measurement benches.
• Understanding of manufacturing constraints and industrial project management.
• Programming in Python and C.
• Written and spoken English, for documentation and exchanges with clients and suppliers.

Soft skills

• Investigative and analytical mindset.
• Autonomy and organisation.
• Adaptability and curiosity for innovation.
• Team spirit, essential on multidisciplinary projects.

Tools and work environment

The optronics engineer uses optical design and calculation software such as Zemax, Code V, LightTools or FRED, calculation and acquisition tools such as Matlab and LabVIEW, and mechanical CAD software such as SolidWorks or Creo for optomechanical integration.

Their time is split between a design workstation, a laboratory and test benches. In defence, the work environment may be subject to secrecy protection rules: restricted-access zones, dedicated information systems, information compartmentalisation.

How do you become an optronics engineer?

Apec indicates three levels of diploma:

• A Master's degree in optics or optronics.
• An engineering degree, preferably with a specialisation in optics or optronics. The Institut d'Optique Graduate School is an engineering school entirely dedicated to optics and its applications.
• A PhD in optics or optronics, common in upstream R&D roles.

According to Apec, at least 2 years of company experience is frequently requested. Entry paths cited include instrumentation engineer, R&D engineer, test engineer, and signal processing engineer.

Optronics engineer salary in 2026

Apec links the optronics engineer to its optics engineer job profile. According to this profile, 80% of the gross annual compensation offered in job postings is between €35k and €53k, fixed and variable combined, averaging €43k (page accessed on 26/09/2026).

A second benchmark, for companies covered by the metalworking industry collective agreement: the 2026 minimum hierarchical salaries (SMH) published by UIMM. An entry-level manager classed F11 has a minimum of €28,430 gross per year on a 35-hour week basis, or €36,959 under the forfait jours. In class G13, the minimum is €40,350, or €52,455 under the forfait jours.

Two reading precautions:

• The Apec range covers salaries offered in job postings, not salaries actually paid.
• The metalworking minimums are collective floors. The class depends on the role, and engineering firms often fall under a different agreement (Syntec collective agreement).

The main factors of variation are experience, level of expertise (system design, upstream R&D, testing), sector, and, in defence, holding a clearance.

What career paths does an optronics engineer have?

Apec cites several career paths:

• R&D project manager, then R&D manager.
• R&D analysis laboratory manager.
• Test engineer.
• Electronics engineer, to broaden their scope.
• Group leader or team leader in a public laboratory, after obtaining a habilitation to supervise research.

The optronics engineer's skills also open doors to related detection and embedded systems roles: radar engineer, avionics engineer or EMC engineer, on equipment qualification.

Hire an optronics engineer with Bluecoders

Are you an optronics engineer looking for a role in defence, aerospace or space? Check out our current openings.

Are you hiring an optronics engineer? A partner of GIFAS and GICAT, Bluecoders recruits engineering profiles for defence, aerospace and space players, including Cegelec Défense and Safran AI. Discover our approach to recruitment in defence and security or contact us.

FAQ

What is optronics?

Optronics is the discipline that combines optics, electronics and signal processing to capture and exploit light, visible or infrared. It is at the heart of thermal cameras, night vision, sights, laser rangefinders and space observation instruments.

What is the difference between an optics engineer and an optronics engineer?

The optics engineer focuses on designing the optical chain: lenses, mirrors, optical design calculations. The optronics engineer works on the complete system, from optics to the detector and signal processing. Apec even groups both titles under a single job profile.

What is the salary of an optronics engineer?

According to Apec, 80% of the salaries offered in job postings for optics and optronics engineers fall between €35k and €53k gross per year, averaging €43k. In the metalworking industry, the 2026 collective minimum for an entry-level F11 manager is €28,430 on a 35-hour week basis.

What studies are needed to become an optronics engineer?

A minimum Master's level: a Master's degree in optics or optronics, or an engineering degree with a specialisation in optics or optronics, such as the one from the Institut d'Optique Graduate School. A PhD is common for upstream R&D roles.

In which sectors does an optronics engineer work?

Mainly defence, aerospace and space, but also the automotive industry, scientific instrumentation, fibre optics, and public or private research. They are found at prime contractors, equipment suppliers, specialised SMEs and engineering firms.

What software does an optronics engineer use?

Optical design software such as Zemax, Code V, LightTools or FRED, calculation and acquisition tools such as Matlab and LabVIEW, and CAD software such as SolidWorks or Creo. They also program in Python and C.

Do you need defence clearance to work in optronics?

Not to practise the profession, but some roles require it. According to the SGDSN, since 1 July 2021 there have been two classification levels, Secret and Très secret (the two French classification levels). Clearance is requested by the employer when the role involves access to classified information, and the relevant positions appear in a job catalogue (catalogue des emplois) specific to each organisation.

What career paths does an optronics engineer have?

Toward R&D management (R&D project manager, R&D manager, laboratory manager), toward technical expertise, or toward related roles such as testing, electronics, radar or avionics.