Senior Process Engineer

Sigmar · Cookstown, Northern Ireland ·

Last confirmed by our partners on 23 Oct 2026.

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Senior Process Engineer Remote & Hybrid options available

Sigmar is delighted to be partnering with a leading engineering contractor in the water and wastewater sector to recruit a Process Engineer for their growing team. This is an excellent opportunity to join a well-established organisation delivering critical water infrastructure projects across Ireland and the UK. The successful candidate will support projects from concept and design through to commissioning and operational optimisation.

Key Responsibilities

  • Develop process designs for water and wastewater treatment projects.
  • Prepare process calculations, mass balances, hydraulic calculations, PFDs and P&IDs.
  • Specify and optimise treatment technologies, including biological, filtration, sludge treatment and chemical dosing systems.
  • Support multidisciplinary engineering teams throughout project delivery.
  • Participate in design reviews, HAZOPs and commissioning activities.
  • Analyse plant performance and identify process improvements.
  • Prepare technical reports, documentation and tender submissions.
  • Liaise with clients, contractors and key project stakeholders.

Essential Requirements

  • Degree in Chemical, Process, Environmental Engineering or a related discipline.
  • 5+ years' experience within water and/or wastewater treatment.
  • Experience delivering municipal or industrial treatment projects.
  • Strong knowledge of biological treatment processes, hydraulic design principles and sludge treatment systems.
  • Experience producing process calculations and technical reports.
  • Knowledge of UK and Irish water industry standards.
  • Strong communication and stakeholder management skills.
  • Full UK driving licence.

Desirable

  • Chartered Engineer (CEng) status or working towards chartership.
  • Experience working with UK or Irish water utility frameworks.
  • Knowledge of BIM or digital engineering environments.
  • Experience supporting commissioning, plant optimisation and automation/control systems.

What's on Offer

A competitive salary and benefits package, ongoing professional development, career progression opportunities, and the chance to work on major water and wastewater infrastructure projects across Ireland and the UK.

Skills

Process engineering water treatment process design

Benefits

  • Paid Holidays
  • Pension
  • Permanent Health Insurance
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