Full-Time

Senior Mechanical PLiM/PLEX Engineer

Posted on 11/23/2025

AtkinsRéalis

AtkinsRéalis

10,001+ employees

Engineering services for infrastructure and energy

No salary listed

Mississauga, ON, Canada

In Person

Category
Mechanical Engineering (2)
,
Requirements
  • Engineering degree from an accredited University in Mechanical, Process or Nuclear Engineering.
  • Registered Professional Engineer in the Province of Ontario, qualified to seal engineering documents.
  • Proven and industry recognized plant life management and extension experience, preferably in the Candu nuclear power plants, fossil fuel power stations, petrochemical plants or oil refineries covering major system and critical equipment, mechanical design and operation and maintenance of industrial machines, automation equipment and automated-tooling design, and/or in equipment engineering with extensive knowledge in pumps, fans, motors, valves, heat exchanges, steam generators, pressure vessels, tanks, piping, HVAC systems, steam turbines, condensers, generators and associated mechanical components, as applicable to nuclear plants.
  • A strong and well recognized team player with an understanding and proven experience of inter-discipline coordination and in developing maintenance-based design and working methodologies for risk assessment and management using mitigation methodologies for plant and equipment aging related degradation mechanisms.
  • Solid understanding of process systems, mechanics and working principles of large sized and complex rotating machines and static equipment, operation and maintenance procedures, mechanics of materials, material selection and fundamentals of machine component design.
  • Solid understanding and experience in equipment sizing, selection, and troubleshooting issues at plant sites.
  • Strong written and oral communication and technical report writing skills.
Responsibilities
  • Lead a team of junior and intermediate engineers, provide mentoring and coaching and impart training and plant life management and extension PLiM/PLEX knowledge transfer to develop human resources into long term corporate assets.
  • Work closely with and monitor and supervise the work of PLiM/PLEX consultants, contractors and vendor service teams for specific tasks and assignments during the normal plant operation and during the outage cycles.
  • Use working knowledge of PLiM/PLEX, Age Related Degradation Mechanism, Systematic Assessment of Maintenance, and FMEA procedures and techniques, work out and implement plant specific methodologies to proactively assess potential damages and put in place sound workable plans and strategies to mitigate the long and short term risks to enhance the plant life, maintain plant operational performance, reliability and safety of the systems, structures, equipment and components in the Nuclear Steam Plant and the Balance of Plant.
  • Provide support to the technical lead to perform conceptual and detail plant life management and life extension activities including systems decomposition, system analysis, criticality analysis, task selection and single point vulnerability assessments.
  • Perform technical review of process flow sheets, detail drawings, equipment arrangement/layouts as well as sizing and selection of mechanical components related to nuclear steam plants, with specific focus on the maintenance-based design and ease of operation and maintenance, and plant life management and life extension.
  • With a strong focus on PLiM/PLEX needs and requirements, interact with other related disciplines and provide mechanical and equipment engineering input for the preparation of technical deliverables including specifications, plant layout, inspection and test procedures, commissioning plans and registration design submissions for nuclear power plant (NPP) components and mechanical systems.
  • A work environment focused on health and safety.

AtkinsRéalis provides engineering services focused on nuclear and infrastructure projects, connecting people, data and technology to transform energy systems and infrastructure worldwide. Its offering combines consulting, design, engineering and project management delivered from concept to commissioning by a global team of experts. The company differentiates itself through its global reach and end-to-end capability across conventional engineering and nuclear sectors, enabling coordinated multi-discipline delivery. Its goal is to improve infrastructure and energy systems worldwide by delivering integrated, high-quality engineering solutions that meet client needs and industry standards.

Company Size

10,001+

Company Stage

Acquired

Total Funding

$2.8B

Headquarters

Epsom, United Kingdom

Founded

1938

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Simplify's Take

What believers are saying

  • Australia's AUD 100B annual defence budget by 2033-34 boosts advisory opportunities.
  • AUKUS AUD 50B submarine investment aligns with nuclear engineering capabilities.
  • Investment-grade S&P rating enables acquisitions like Coras and WGA.

What critics are saying

  • Australian regulators block Coras acquisition in 3-6 months over foreign ownership.
  • AECOM undercuts on AUKUS contracts, stripping $500M backlog in 6-12 months.
  • Ontario Power Generation delays Darlington, erasing $2.5B nuclear revenue in 12-24 months.

What makes AtkinsRéalis unique

  • Combines global engineering with Coras' local Australian defence advisory expertise.
  • Acquires WGA adding 800 professionals in transportation, water, and defence infrastructure.
  • Secures record $21.2B backlog from nuclear services and infrastructure projects.

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Benefits

Health Insurance

Dental Insurance

Vision Insurance

Life Insurance

Disability Insurance

401(k) Company Match

401(k) Retirement Plan

Unlimited Paid Time Off

Flexible Work Hours

Company News

Yahoo Finance
Feb 28th, 2026
AtkinsRéalis reports record backlog of $21.2B and sells Highway 407 stake for $2.6B

AtkinsRéalis Group reported record 2025 results, with revenue rising 13% and backlog reaching a record $21.20 billion. The company completed the sale of its remaining Highway 407 interest for $2.60 billion and secured an investment-grade credit rating, enhancing financial flexibility for growth in engineering and nuclear services. The board reaffirmed a quarterly dividend of $0.02 per share, payable on 27 March 2026. Management maintained 2026 guidance for 5-7% organic revenue growth in engineering services and projected $2.50 billion in nuclear revenue. The company's narrative projects CA$12.80 billion revenue and CA$896.40 million earnings by 2028, requiring 7.4% annual revenue growth. However, investors face execution risks from concentrated nuclear exposure and complex infrastructure contracts that could introduce earnings volatility.

The Associated Press
Feb 27th, 2026
AtkinsRéalis posts $2.6B profit, hits record $21.2B backlog with nuclear revenue up 55%

AtkinsRéalis Group, a world-class engineering services and nuclear company, reported fourth-quarter revenue of $2.9 billion, up 13% year-over-year, with full-year revenue reaching $11.0 billion, up 14%. AtkinsRéalis Services revenue increased 17% in Q4 and 16% for the full year. The company achieved diluted earnings per share from Professional Services & Project Management of $2.14 for 2025, up 80%, whilst adjusted diluted EPS reached $3.36, up 88%. Full-year operating cash flow totalled $461 million, and backlog reached a record $21.2 billion as at 31 December 2025. For 2026, AtkinsRéalis expects Engineering Services Regions organic revenue growth of 5-7% and Nuclear revenue of approximately $2.5 billion. Operating cash flow is projected at roughly $500 million.

Cision
Dec 1st, 2025
AtkinsRéalis Acquires ADG Engineers Australia

AtkinsRéalis Group Inc. has acquired ADG Capital Pty Ltd, an Australian engineering consultancy. This acquisition aims to expand AtkinsRéalis' presence in the Australian market, adding ADG's 250 professionals to its team. The move enhances their capabilities in infrastructure, Defence, and Power & Renewables sectors. ADG, founded in 2002, is known for technical innovation and complex project delivery. This aligns with AtkinsRéalis' strategy of "Delivering Excellence, Driving Growth.

AtkinsRéalis
Nov 10th, 2025
AtkinsRéalis Acquires U.S.-based C2AE Architecture and Engineering Firm

Montreal: November 10, 2025– AtkinsRéalis Group Inc. (TSX: ATRL), a world-class engineering services and nuclear company with offices around the world, announced today that it has acquired C2AE, Inc. (“C2AE”) a Michigan-based architecture and engineering firm with eight locations and

Stock Titan
Mar 13th, 2025
Ferrovial Buys 5.06% 407 ETR Stake

Ferrovial is set to increase its stake in 407 ETR to 48.29% by acquiring up to 5.06% from AtkinsRéalis for [CAD]2.09 billion. The deal includes a 3.30% acquisition at closing and a 1.76% deferred stake via a put and call option. Additionally, AtkinsRéalis will sell its remaining 1.7% stake to CPP Investments, while PSP Investments will acquire a 7.51% interest from CPP Investments. The transactions are expected to close in Q2 2025, subject to conditions.

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