Regeneron Ireland Posted September 8, 2026

Principal Facilities Engineer

Limerick, Ireland Full time
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Regeneron Ireland is the source of truth for this posting and owns the application process. We surface normalized context and market comparison you won't find on the original listing.

About this opportunity

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 a   Principal 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

Job details

Seniority
Principal
Function
Facilities & Administration
Therapeutic area
Not listed
Location
Limerick, Ireland
Employment type
Full time

How this role compares

Computed from every other active Facilities & Administration role in our database, not just this employer's listings.

We currently track 13 comparable Principal Facilities & Administration roles across 9 biopharma companies.

13Comparable roles tracked
12Currently active
9Companies hiring similar roles
3Countries represented

Salary context

6 of 13 peers report a salary range (USD, annualized)

Peers share this role's job function and a matching or adjacent seniority level -- not necessarily the same therapeutic area or country.

This roleSubject Not listed on this posting
Lowest disclosed · Senior Facilities Maintenance Scheduler & Planner · Regeneron Pharmaceuticals, Inc (USA) $30/hr – $47/hr (≈ $62,899–$98,509/yr)
Highest disclosed · Director Critical Utilities · Regeneron Pharmaceuticals, Inc (USA) $183,100/yr – $305,200/yr
Peer group range $80,704 – $244,150 (median $238,381)

Where these roles are based

Top locations among the 13 comparable roles

United States10
Ireland2
Russia1

Seniority mix

13 of 13 peers have a known seniority level

Senior9
Director4

Therapeutic area mix

0 of 13 peers have a known therapeutic area; the rest are genuinely unlabeled, not hidden

No peers with a known therapeutic area yet.

Similar opportunities

The closest matches from our peer group, ranked by how similar they are, not how well you'd qualify for them -- treat this as market context, not a guaranteed shortlist; a weak match is labeled as one below.

50%similar
Regeneron Ireland Limerick, Ireland Senior
Same function Adjacent seniority Same country
50%similar
Regeneron Ireland Limerick, Ireland Senior
Same function Adjacent seniority Same country
35%similar
BMS Pharma.Ltd Manati, United States Senior
Same function Adjacent seniority
35%similar
Regeneron Pharmaceuticals, Inc (USA) Tarrytown, United States Senior
Same function Adjacent seniority
35%similar
Regeneron Pharmaceuticals, Inc (USA) Tarrytown, United States Director
Same function Adjacent seniority
35%similar
E.R. Squibb & Sons,L.L.C. New Brunswick, United States Senior
Same function Adjacent seniority

Notify me about similar jobs

Get an email when we spot other openings like this one – same job function, comparable seniority, roles you'd actually want to see.

How we calculate "similar"

No black box, no LLM guesswork: a deterministic score built from four normalized attributes. Here's this role's own peer group at different match levels, so you can see the mechanism, not just the result.

Every comparison starts from the same 100-point budget: 25 for working in the same function, 40 for the same therapeutic area, 20 for the same or adjacent seniority, 15 for the same country. A dimension we can't confirm on both sides contributes nothing, never a guess, never a free pass.

50%
Senior Electrical Project Engineer
Regeneron Ireland · Limerick, Ireland · Senior
Function Therapeutic area Adjacent seniority Country
35%
Senior Facilities Maintenance Scheduler & Planner
Regeneron Pharmaceuticals, Inc (USA) · Tarrytown, United States · Senior
Function Therapeutic area Adjacent seniority Country
35%
Director, Facilities Operations
Gilead Sciences, Inc. · Foster City, United States · Director
Function Therapeutic area Adjacent seniority Country
35%
Director R&D EHS Program Lead
Pfizer · Groton, United States · Director
Function Therapeutic area Adjacent seniority Country
Unmatched or unknown dimensions score exactly the same: 0 points, never a partial guess. A role we know almost nothing about beyond its function bottoms out at 25%; it never inflates to 100% just because there's little to compare against. Seniority uses a defined ladder (Associate → Manager → Associate Director → Senior → Principal → Director → Senior Director → Executive/VP) so "Director" and "Senior Director" count as adjacent, but "Director" and "Executive/VP" do not.