Are you looking for a hands‑on opportunity where you can apply your technical skills in a meaningful way? In the Plumber/Steamfitter role, you’ll be working on installation, fabrication, troubleshooting, and maintenance of critical piping systems that support research, operations, and decommissioning in a truly unique industrial environment. If this sounds like the kind of work you’re excited about, this may be the job for you — apply today!

What will you be doing!

Performing preventive and corrective maintenance, testing, commissioning, and troubleshooting on piping systems and associated mechanical equipment to support site infrastructure and research facilities.
Constructing and installing piping systems and related equipment, including cutting, fabricating, fitting, and safely removing piping or components when required.
Executing decommissioning tasks on piping systems and equipment, ensuring hazards are removed in a controlled and compliant manner.
Reading and interpreting drawings, work packages, and technical documents to fully understand job scope and ensure adherence to Canadian Nuclear Laboratories (CNL) requirements and applicable codes.
Interpreting maintenance records and route sheets, signing off on required documentation in alignment with quality control standards.
Maintaining clean, organized, and safe work areas, tools, and equipment in accordance with provincial, federal, and CNL regulations.
Attending safety meetings, reporting safety concerns, and applying CNL’s Event Free Tools throughout daily work.
Assisting in the training, coaching, and mentoring of trainees and apprentices, including demonstrating techniques, supporting skill development, and providing feedback on performance.
Other duties as assigned by your manager.

What we are looking for:

Education
- Secondary school diploma.
- Qualification as a Plumber/Steamfitter, typically obtained through completion of a 9,000‑hour apprenticeship or equivalent.
Knowledge, Skills & Abilities
- Knowledge of applicable codes and standards (CSA B51.1, ASME, NFPA).
- Ability to use and endorse Personal Protective Equipment (PPE).
- Ability to read blueprints and technical drawings and cross‑reference them with parts lists.
- Skilled in operating standard shop tools, portable power tools, calibration equipment, and machine tools safely.
- Strong written and verbal communication skills for working with multi‑trade teams.
- Ability to perform troubleshooting to ensure safe operation and continuity of production.
Security Clearance Eligibility Required
- Reliability Status with Site Access Security Clearance (SASC), which has a minimum requirement of 3-5 years of verifiable history in Canada, Australia, New Zealand, the United States and/or the United Kingdom. CNL implements security screening in accordance with the Treasury Board of Canada Secretariat's “Standard on Security Screening” and the “Policy on Government Security.”

Working Conditions:

Working schedule: Four (4) days per week, ten (10) hours per day, for a 40‑hour work week (4×10).
Work involves physical activity and may include exposure to:
- varying temperatures
- confined spaces
- heights
- radiation environments
Must be physically fit and able to don/doff PPE.

Why CNL?

Does the idea of working with a dynamic team across Canada to advance nuclear science and technology for a clean and secure world excite you? At CNL, we’re reinventing ourselves to be industry leaders—pioneering solutions to the problems that matter most.

From building the next generation of clean nuclear and hydrogen energy technologies, to developing targeted cancer treatments, to continuing our global leadership in environmental remediation—we are driven by impact, innovation, and purpose.

What We Offer: A Total Rewards Package

We believe in taking care of our people. Here’s what you can expect as part of our team:

Paid time off: vacation, sick, personal, and floater days
Benefits effective Day One – no waiting period
Tuition support to help you keep learning and growing
A defined-benefit pension plan or a defined-contribution pension plan, depending on your employee group, to support your long‑term financial security

Do Our Priorities Resonate with You?

Delivering clean energy for today and tomorrow
Restoring and protecting the environment
Contributing to the health of Canadians

If so, you’ll feel right at home at CNL!

Location: Onsite

Located in the heart of the Ottawa Valley, our Chalk River site offers a beautiful natural setting with forests, lakes, and wildlife, right at your doorstep. Surrounded by welcoming communities such as Deep River, Petawawa, and Pembroke, you’ll have access to unparalleled outdoor adventures and a fantastic work-life balance.

Please note: This is a fully on-site position based at our Chalk River Laboratory in Ontario.

Our Commitment to Equity, Diversity & Inclusion

At CNL, we are committed to fostering an environment that promotes equity, diversity, and inclusion. We celebrate and welcome employees, stakeholders, and partners of all backgrounds and identities. Click here to read all about it!

We are proud to uphold a workplace culture grounded in our Core Values:

Respect
Teamwork
Accountability
Safety
Integrity
Excellence

These values drive our employment practices and ensure meaningful career development opportunities and accommodations for all employees.

CNL is an equal opportunity employer. If you require accommodation during any phase of the hiring process, please let us know via jobs@cnl.ca. All requests will be handled with confidentiality.

CNL operates on sites located on the traditional lands, waterways and ceded and unceded territories of Indigenous peoples. CNL recognizes and affirms all First Nations, Métis communities and Inuit in this land we now know as Canada. We acknowledge, respect and seek to better understand Indigenous history, rights and title on the lands where we work and develop projects. We honour and respect the importance of the relationship between Indigenous peoples and their lands, waters and territories.