Senior Engineer, Mechanical (Nuclear)

Senior Engineer, Mechanical (Nuclear)Come Build Your Career at Aecon! Aecon delivers some of the most complex and impactful infrastructure projects — from transformative transportation networks to critical energy, industrial and nuclear programs. The projects we build connect communities and power future generations. With deep roots in North America and a strong footprint internationally, Aecon brings global expertise and proudly serves public and private sector clients through its Construction and Concessions segment. Safety Always is not only our #1 core value – it is the standard that anchors our culture. We believe the most ambitious projects deserve the most committed people. At Aecon, you won't just build your career — you'll help build what matters to enable future generations to thrive. At Aecon, you can count on: Safety Always. Our number one core value. The safety of our people, projects, partners, and stakeholders is our priority focus – today and always. Integrity. We lead by example, with humility and courage. Accountability. We're passionate about delivering on our commitments. Inclusion. We provide opportunities where people feel valued, supported, and empowered to contribute fully. We deliver infrastructure with purpose, and our people are at the heart of everything we do. Aecon employees are incredibly proud to build some of the most impactful infrastructure of this generation – we call it Aecon Proud. At Aecon we: Ensure you and your family receive the services and benefits needed to support your mental, emotional, and physical well-being. Are intentional when it comes to investing in your development. We help you build your career and advance your skills through our Aecon University, tuition reimbursement, and Leadership Programs. Are committed to creating work environments focused on mutual respect, teamwork, collaboration, and new ideas, through meaningful initiatives, training, and partnerships with Veteran groups, to ensure we are building with top talent and harnessing our collective strengths within every aspect of our culture. Operate responsibly by managing risk, safety, and environmental considerations across all our projects and surrounding communities. Our success is built on the passion, expertise, and dedication of our people. Together, we embrace strong execution, innovation, and continuous improvement — values that come to life through the unique talents and collaborative spirit of every team member. If you're inspired to make a difference through future-building projects, join our best-in-class team.What is the Opportunity? At Aecon Engineering Services Inc. (United), we are a team of engineers, builders, planners, and thinkers that design and build today's infrastructure, for tomorrow. We come to work every day committed to drive growth and deliver projects that matter for our clients, ourselves, and our communities. Through our work in the nuclear, conventional generation, renewable and power delivery markets, we create resilient infrastructure to last generations. In December 2024, United Engineers and Constructors was acquired by Aecon Group Inc. Aecon and United have a proven working relationship and the United team continues to operate in the market as an engineering, procurement and construction (EPC) company. 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 universityMinimum 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.Nice to Have:NANTeL Certified in the Nuclear Standard Design Process (IP-ENG-01)Professional Engineering (PE) license in USExperience with fluid flow software (AFT FATHOM, or Equivalent)Experience with Fire Protection and Detection SystemsCitizenship Requirement: This position requires access to nuclear facilities and information governed by U.S. federal regulations. As a result, applicants must be U.S. citizens to meet eligibility and security clearance requirements.Pay and Benefits: Pay Range: $100,000 - $150,000 per year Individual pay is determined based on several factors, including work location, education, experience, unique skills and job conditions. Other considerations may include certifications, specialized training, and the complexity or scope of the role. Health Insurance Benefits (Comprehensive Plan- Dental/Medical/Vision) 401K (comprehensive match plan) Paid Vacation - (vacation/wellness days) Health and Wellness Home Benefit - (wellness subsidy for fitness/health) Tuition Reimbursement - (strong career growth support for approved degrees, diplomas and courses)Aecon fosters 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. Aecon is committed to ensuring all job postings are compliant with all applicable laws. Any candidate who has a concern regarding the contents of this or any other job posting can email View email address on click.appcast.io.