Principal Mechanical Engineer

5 days ago


Belfast, United Kingdom AECOM Full time

About the Role:

AECOM is seeking a highly skilled Senior/Principal Mechanical Engineer to join our dynamic Water Engineering team in Belfast, Dublin, or Cork offices. As a key member of our team, you will be responsible for delivering high-quality technical outputs, collaborating with multidisciplinary teams, and leading water and wastewater projects from feasibility to construction.

Key Responsibilities:

  • Produce feasibility studies, outline design, detailed design, and provide construction support for water and wastewater projects.
  • Liaise and collaborate with water and other discipline teams, including civil, electrical, process, and mechanical engineers nationwide.
  • Deliver high-quality technical outputs, contribute to bids, and interface with clients and collaborators in design and planning.
  • Ensure projects meet agreed budgets, timelines, and quality standards, and assist in preparing project budgets and schedules.
  • Design mechanical installations, typically including municipal water and wastewater pumping stations, screens, grit removal plants, penstocks, valves, odor control systems, and pipework.
  • Conduct site visits to perform surveys and support liaisons with clients, contractors, and suppliers.
  • Produce plant layouts, technical specifications, Wimes datasheets, valve schedules, equipment schedules, lifting strategies, and P&IDs.
  • Create pumping station designs, headloss calculations, and pumping system analysis/pump selection.

About You:

  • A degree or equivalent in mechanical engineering.
  • Chartered Engineer Status (or approaching chartered status) with a relevant professional institution, such as IET.
  • Proven ability to produce, check, and approve engineering reports, designs, drawings, technical specifications, and calculations.
  • Experience in leading and mentoring a team of engineers and technicians, including line management responsibilities.
  • Extensive experience in water and wastewater projects across feasibility, outline design, detailed design, and construction support.

What We Offer:

  • A dynamic and inclusive work environment with opportunities for career growth and development.
  • A competitive salary and benefits package.
  • The chance to work on high-profile water and wastewater projects with a leading infrastructure consulting firm.
  • The opportunity to collaborate with a multidisciplinary team of experts and contribute to the delivery of innovative solutions.


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