Senior Engineer, Mechanical

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Date: Dec 2, 2025

Location:Mt. Laurel, NJ, US

Operating Sector: Nuclear

Position Title: Senior Engineer, Mechanical (Nuclear)

Come Build Your Career at Aecon

As a North American leader in infrastructure development, Aecon is safely and sustainably building what matters for future generations to thrive We lead some of the most impactful infrastructure projects of our generation, at the forefront of transformational change in transportation and energy, and partnering every day to build, connect, power, and strengthen our communities.

At Aecon, you can count on:

• Safety Always. Our number one core value. If we can't do it safely, we don't do it at all.
• Integrity. We lead by example, with humility and courage.
• Accountability. We're passionate about delivering on our commitments.
• Inclusion. We provide equitable opportunities for everyone.

We lead the infrastructure industry with purpose, and our people are at the heart of everything we do. So, we invest in our people, just like they invest in us

At Aecon we:

• Ensure you and your family receive the services needed to support your mental, emotional, and physical well-being.
• Believe in helping you build your career through our Aecon University and Leadership Programs.
• Are committed to supporting and investing in inclusive work environments, through initiatives like Diversity, Equity, Inclusion, & Accessibility training, our Aecon Women in Trades and Aecon Diversity in Trades programs, and our Employee Resource Groups (ERGs) to ensure we are building inclusion into every aspect of our culture at Aecon.
• Are a leader in sustainable construction. With a strong commitment to operating responsibly by minimizing our impact on the environment and surrounding communities.

Our business success relies on strong execution and continuous improvement – driven by the diversity, expertise and teamwork of our people. We're always searching the globe for innovative, collaborative minds to join our best-in-class Aecon community

We are looking for a Sr. Mechanical Engineer to support a number of our nuclear power plant projects. The successful candidate will be working as part of a team of engineers and designers preparing modification packages for mechanical systems serving the nuclear power industry.

What You'll Do Here

• Develop design modification packages for mechanical systems at a nuclear power plant.
• Perform engineering calculations such as hydraulic analysis, equipment sizing, HVAC sizing, heat load analysis, and pressure loss calculations.
• Develop mechanical design and procurement specifications.
• Prepare engineering drawings such as Piping and Instrument Diagrams (P&ID), General Arrangement (GA), Equipment Plan, Piping Orthographic and Isometric drawings.
• Develop material and workhour estimates as well as engineering and design schedules.
• Exercise sound engineering judgment in assessing problem situations or complex issues, review completed work to ensure accuracy and compliance with codes and design criteria.
• Interface with plant stakeholders to determine project scope/requirements, support construction/implementation and start up activities as required.

What You Bring To The Team

• Bachelor of Science degree in Mechanical Engineering from a four-year accredited college or university
• Minimum of 5-10 years of relevant experience (4 years nuclear) in the mechanical engineering field.
• The ability to obtain unescorted access to a nuclear power plant.
• Must be a United States Citizen

Preferred Qualifications

• NANTeL Certified in the Nuclear Standard Design Process (IP-ENG-01)
• Professional Engineering (PE) license in US
• Experience with fluid flow software (AFT FATHOM, or Equivalent)
• Experience with Fire Protection and Detection Systems

Aecon fosters diversity, inclusion and belonging within and across our organization. We consider all applicants for positions without regard to race, color, religion, sex, national origin, age, mental or physical disabilities, veteran status, and all other characteristics protected by law.

We are committed to adhering to the objectives and requirements outlined in the Equal Employment Opportunity Commission (EEOC), and to meeting the accessibility needs of persons with disabilities in a timely manner, through the implementation of the requirements of the EEOC and its applicable regulations. Appropriate accommodation under the EEOC will be provided upon request throughout the interview and hiring process.