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Added 13 mins ago
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Tetra Tech

Senior Mechanical Engineer

Pickering, ON, Canada

Pay: The expected annual compensation range for this position is $135,000-$180,000.
Job type: Full-time
Apply by: Oct 31, 2026
Experience: 10+ years of related working experience in a design consulting environment is considered an asset
Posting language: English
Posted: Oct 1, 2026

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Original job description

Senior Mechanical Engineer

Tetra Tech Canada Inc.

CNU Division

Discover your full potential. At Tetra Tech, we are collaborating with industry-leading experts for a sustainable future for our world. We combine consulting and engineering with advanced analytics and technology to solve the world’s most complex challenges. Our innovation hubs across the globe will enable you to share ideas and best practices while growing your professional network. Wherever you are in your career journey, you will benefit from working with world-class engineers, scientists, and technical specialists.

Apply today and join the company that is Leading with Science®.

Your Role

We are currently seeking a Senior Mechanical Engineer for our Pickering, ON office. This posting is for an existing vacancy for which we are actively recruiting. To perform this job successfully, an individual must be able to perform each essential duty satisfactorily. The requirements listed below are representative of the knowledge, skills and abilities required by the position.

Responsibilities

Responsible for the specification, sizing of equipment, and the inter-connection to ensure satisfactory process performance
Piping & Instrumentation Diagrams (P&ID)
Datasheet/Technical specification of process equipment
Support on the general arrangement of the process
Validation of subcontractors’ documents
Start-up notes and O&M manuals
Uses initiative and judgement in resolving problems, interprets engineering specifications, obtaining and analyzing data and design
Develop effective working relationship with colleagues, officials and associates for the purpose of discussing design problems, explaining design features and specification and other project control criteria
Solve problems by use of combinations of standard procedures, modifications of standard procedures or methods developed in previous assignments
Conducts independent studies and analysis making interpretation and typical decisions
Exercises independent judgement in selecting and interpreting information, handling deviations from standard methods and resolving difficulties
Preparation and/or verification of procurement activities and deliverables.
Prepare purchase requisition, review technical content of supplier bids and technical submissions
Perform any required inspections as necessary for procurement of material.
Provides guidance to junior engineers and technical staff assigned to a common task
On occasions, gets involved in the tendering and the construction phase to provide support to the commissioning engineers during the start-up and the performance tests of the plants

Qualifications

Completion of a four-year University Degree in Mechanical Engineering
10+ years of related working experience in a design consulting environment is considered an asset
Registered Professional Engineer (P.Eng) in Ontario
Must be able to obtain a federal security clearance
Should be able and willing to occasionally travel to other office locations and client sites/locations as required
Work experience as a Mechanical Engineer in a nuclear environment, working on Ontario Power Generation or Bruce Power projects is considered an asset.
Experience with flow analysis and pipe stress analysis software would be considered an asset
Specific knowledge in piping, and specifically alloyed piping in terms of definition, specification, calculation, sourcing, prefabrication and assembly will be considered an asset
Working knowledge of Facilities and HVAC design would also be considered an asset
Knowledge of related disciplines, i.e. Civil/Structural, Electrical and Instrumentation/Controls is required
Demonstrate ability to be flexible, adaptable and work under tight schedules in a fast-paced environment

Compensation

The expected annual compensation range for this position is $135,000-$180,000. Please note that Tetra Tech considers various factors in determining compensation, including but not limited to education, relevant and demonstrated work experience in the role, skills, geographic location, qualifications, certifications, and other competencies relevant to the needs of the business.

Additional Information

A requirement of working for Tetra Tech is that you are at least 18 years of age and legally entitled to work in Canada. (A copy of a valid work permit may be required.)

If you are considered for the position, clearance on all applicable background checks (which may include criminal, identity, educational and security) and professional reference checks are required. Some Tetra Tech positions require an enhanced level of background assessment, which is dictated by law. These positions require advanced criminal record checks that must also be conducted from time to time after commencement of employment.

About Tetra Tech

Tetra Tech combines the resources of a global, multibillion-dollar company with local, client-focused delivery in more than 500 locations around the world. Our reputation rests on the technical expertise and dedication of our employees - 25,000 associates working together to provide smart, scalable solutions for challenging projects. We are proud to be home to leading technical experts in water, environment, infrastructure, resource management, energy, and international development. Explore our open positions at https://www.tetratech.com/careers. Follow us on social media to learn more about our people, culture, and opportunities:

LinkedIn: @TetraTechCareers

Twitter: @TetraTechJobs

Facebook: @TetraTechCareers

Tetra Tech CNU invites resumes from all interested parties. To apply, please submit your resume and cover letter on the Careers portion of our website at www.tetratech.com/careers . Reasonable accommodations may be made to enable individuals with disabilities to perform the essential functions.

Tetra Tech CNU hereby confirms that no artificial intelligence systems are used to screen, assess, or select applicants for this position. All applicant information is reviewed and assessed exclusively by human decision-makers throughout every stage of the hiring process.

We thank all applicants for their interest, however, only those candidates selected for interviews will be contacted.

Please no phone calls or agencies.

Additional Information

Organization: 717 CNU

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More about this job

Responsibilities

Specify and size equipment, develop piping and instrumentation diagrams and technical documentation, support process layouts, and validate subcontractor deliverables. Lead and support procurement activities, resolve engineering and design issues, guide junior staff, and provide commissioning support during plant start-up and performance testing.

Requirements

Requires a four-year university degree in Mechanical Engineering, at least 10 years of related experience in a design consulting environment, and an Ontario Professional Engineer (P.Eng.) registration. Candidates must be able to obtain federal security clearance; nuclear project experience, piping and analysis software expertise, HVAC knowledge, and familiarity with related engineering disciplines are assets or additional requirements.

Skills

Mechanical Engineering
Equipment Specification and Sizing
Process Performance
Piping and Instrumentation Diagrams
Process Equipment Datasheets
Technical Specifications
Process General Arrangement
Procurement
Supplier Bid Review
Piping
Pipe Stress Analysis
Flow Analysis
HVAC Design
Nuclear Engineering
Cross-Disciplinary Coordination

Visa sponsorship

Not detected in the job text

Keywords

Mechanical Engineering
Professional Engineer (P.Eng.)
Nuclear Environment
Ontario Power Generation
Bruce Power
Equipment Specification
Equipment Sizing
Process Performance
Piping and Instrumentation Diagrams
Process Equipment Datasheets
Technical Specifications
General Arrangement
Procurement
Purchase Requisitions
Supplier Bid Review
Material Inspection
Commissioning
Plant Start-Up
Performance Testing
Piping
Alloyed Piping
Flow Analysis
Pipe Stress Analysis
HVAC Design
Civil and Structural Engineering
Electrical Engineering
Instrumentation and Controls
Federal Security Clearance

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