Internship - Defectivity Engineer - Summer 2026

Introduction to the job

ASML is seeking a summer intern in Materials Science, Chemistry, Physics, Mechanical Engineering, or a related field, to join the Defectivity Group in the Wilton, CT location. Within ASML, the Development & Engineering (D&E) sector is responsible for the specification and design of ASML products. The Defectivity group is responsible for creating the perfect environment within the vacuum reticle modules in cutting edge EUV lithography machines. We take many approaches, such as designing the gas flow in vacuum, choosing the correct materials and designing cleanliness processes. As ASML pushes the boundaries of nanotechnology beyond current state of the art, we need to study nanoparticle behavior in new ways. We are looking for someone to help pioneer knowledge in this developing area.

The Defectivity Group in Wilton, CT is looking for an engineering intern in one of the following disciplines:

• Materials science / materials engineering / nanotechnology
• Tribology: wear resistance of coatings and materials
• Physics: plasma, electrostatics and materials compatibility
• Mechanical: Small particle behavior in gas flows and high vacuum
• Software: Data analysis and image processing for particle adder detection
• Electrical: Test equipment hardware and software, scripting in Python or Matlab
• Chemistry: chemical cleaning methods for vacuum grade cleaning, characterization of coatings, surface treatments

Role and responsibilities

As an intern in the Defectivity group you will participate in developing portions of the lithography system and/or associated tooling and test equipment. You will work on sub-systems involving robotics, mechatronics, precision mechanics, and/or opto-mechanics. You will need to consider engineering specifications and performance, lifetime, failure modes, root cause analysis, statistical analysis, measurement system capability, etc.

You will collaborate with system architects and engineers in a multidiscipline project team to develop concepts, perform engineering analysis, build and test prototypes, design experiments, and/or analyze data.

• Design of experiments for a wide range of project needs.
• Derive conclusions from analysis to make practical recommendations.
• Technical writing and communication skills, including the ability to present results based on scientific evidence to audiences of a wide range of technical abilities
• Take direction from ASML System Architects and Senior Engineering mentors who are leading the development effort of critical large capital equipment.

Education and experience

At minimum, candidate for Bachelor’s degree in a Science or Engineering discipline (such as Materials Science, Chemistry, Physics, Mechanical Engineering), with at least 2 years completed.

Personal skills

• Team player willing to work with high level problem solvers on a daily basis.
• Genuine interest in materials science, engineering, and analysis, as well as in developing precision systems that can perform reliably at customer sites
• High energy, self-motivated, quick study, flexible nature.
• Customer-centric personal ethos.
• Ability to handle multiple projects and tasks concurrently and with minimal guidance.

Other Information

ASML Offers:

• A challenging opportunity to expand your knowledge in a wide variety of engineering application areas and to work on problems spanning all technical fields.
• Highly creative and qualified teams with a diversity of experience.
• Great career opportunities at a quickly growing high-tech company.
• World class technical problems to sol

Additional Responsibilities:

There is potential for exposure to strong magnetic fields, high voltage and currents.

This position requires access to controlled technology, as defined in the United States Export Administration Regulations (15 C.F.R. § 730, et seq.). Qualified candidates must be legally authorized to access such controlled technology prior to beginning work. Business demands may require ASML to proceed with candidates who are immediately eligible to access controlled technology.

Inclusion and diversity

ASML is an Equal Opportunity Employer that values and respects the importance of a diverse and inclusive workforce. It is the policy of the company to recruit, hire, train and promote persons in all job titles without regard to race, color, religion, sex, age, national origin, veteran status, disability, sexual orientation, or gender identity. We recognize that inclusion and diversity is a driving force in the success of our company.

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Request an Accommodation

ASML provides reasonable accommodations to applicants for ASML employment and ASML employees with disabilities. An accommodation is a change in work rules, facilities, or conditions which enable an individual with a disability to apply for a job, perform the essential functions of a job, and/or enjoy equal access to the benefits and privileges of employment. If you are in need of an accommodation to complete an application, participate in an interview, or otherwise participate in the employee pre-selection process, please send an email to USHR_Accommodation@asml.com to initiate the company’s reasonable accommodation process.

Please note: This email address is solely intended to provide a method for applicants to initiate ASML’s process to request accommodation(s). Any recruitment questions should be directed to the designated Talent Acquisition member for the position.