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Salary
$71k – $116k per year
Location
In office (Limerick)
Seniority
Principal · 8+ years exp
Employment
Full-Time

Confirmed on the employer's own hiring board on Oct 19, 2026. First seen by Alion on Sep 8, 2026. Regeneron Japan scores B on the Alion truth index.

Overview
Company
Impact
Profile match
Regeneron Japan (Regeneron Japan KK) is the Japanese subsidiary of Regeneron Pharmaceuticals, a science-driven biotechnology company that invents, develops, and commercializes life-transforming medicines for serious diseases. Headquartered in Tokyo, Japan, with its global corporate headquarters located in Tarrytown, New York, the organization manages clinical trial programs, regulatory affairs, and commercial operations throughout the Japanese market. Leveraging proprietary antibody discovery and genetic research platforms, it focuses on delivering targeted treatments across therapeutic areas such as oncology, immunology, ophthalmology, and rare genetic disorders.

Build our future together:

At Regeneron, we use science and innovation to develop life-changing medicines for people with serious diseases. Regeneron is currently seeking aPrincipal Facilities Engineer to join our Facilities Operations, Utilities & HVAC team.

This position offers the opportunity to contribute to a fast-growing, science-driven organization making a meaningful difference to patients worldwide.

When & where:

  • Location: Raheen, Limerick

What you’ll do:

  • Designing and specifying cGMP clean/grey utilities, & HVAC equipment, piping, ducting and/or controls
  • Managing small-to-mid sized projects related to utilities & HVAC equipment & services
  • Conducting troubleshooting for complex issues with plant equipment issues and associated systems, identifying and recommending corrective actions
  • Assisting in the design review, site acceptance and installation of equipment
  • Supporting the QA Validation department by preparation of design documents and assists in protocol execution
  • Assisting in investigations of utility systems, and control system anomalies as well as safety incidents
  • Implementing corrective/preventative actions for existing equipment and maintenance processes
  • Preparing engineering evaluations and test plans for and executes modification change control documentation
  • Interpreting P&IDs, equipment/system layouts, wiring diagrams and specifications in planning and performing maintenance and repairs
  • Maintaining company reputation by enforcing compliance with all relevant laws, policies and regulations

The environment and physical rhythms of this role:

  • You have strong analytical and interpersonal skills
  • You are able to prioritise and re-prioritise as needed and adapt to change
  • You are comfortable working in a fast-paced setting

Let’s find out if we’re a fit:

  • Principal - Requires BS/BA in Mechanical engineering with 8+ years of relevant experience or equivalent combination of education and experience.

Thrive today. Grow tomorrow.

#IRELIM #JOBSIEST #LI-Onsite

Does this sound like you? Apply now to take your first step towards living the Regeneron Way! We are committed to building a workplace with an inclusive culture. Regeneron is an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion or belief (or lack thereof), sex, sexual orientation, gender identity or expression, gender reassignment, marital or civil partnership status, civil status, pregnancy or parental status, age, disability, nationality, citizenship status, ethnic or national origin, membership of the Traveler community, familial status, genetic information, military or veteran status, or any other characteristic protected under applicable law. Where required, we will provide reasonable accommodation to applicants with known disabilities or chronic illnesses during the recruitment process, unless such accommodation would impose undue hardship.

Where necessary, we disclose salary ranges for roles in all countries in which we operate. The final offer will be determined within the relevant range based on the country of employment, specific role level, and your skills and experience. In some countries, collective bargaining agreements (CBAs) may apply and influence certain elements of pay or benefits. Regeneron offers a competitive and comprehensive total rewards package which may include, depending on country and role: annual bonuses or other incentive plans, equity awards, pension or retirement benefits, 401(k) company match, health and wellness programs, fitness centers, insurance benefits (e.g. medical, dental, vision, life and disability), paid time off, and family support benefits. For additional information about Regeneron benefits in the U.S., please visit https://careers.regeneron.com/en/working-at-regeneron/total-rewards/. For other locations, additional information will be provided during the recruitment process. If you have any questions, please speak with your recruiter.

Please be advised that at Regeneron, we believe we do our best work when we are together. For that reason, many roles are required to be performed on-site. Please speak with your recruiter and hiring manager for more information about on-site expectations for your role and location.

As part of the recruitment process, certain background checks may be conducted in accordance with the laws of the country where the position is based. The purpose of such checks is to verify certain information prior to the commencement of employment such as identity, right to work and educational qualifications.

For jobs in Canada: this posting is for an existing position.

Salary Range (annually)

€63,200.00 - €103,200.00
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