Lead Water & Wastewater Process Engineer – Hybrid (UK)

Egis; Greater London; Hybrid; GBP 75,000 - 110,000; Full time

Benefits offered by this job

Hybrid and flexible working

26+ days annual leave

Professional development & chartership

Job summary

Egis is expanding its UK Water team and seeks a Principal Process Engineer to shape major water and wastewater projects across the UK. The role offers hybrid working in London, Bristol, or Manchester and rapid progression within a high-growth environment.

You will lead process design, mentor engineers, and drive innovation across AMP‑8, SROs and related programmes, collaborating with mechanical, civil, and operations teams for robust, sustainable solutions.

Qualifications

• BEng/MEng or equivalent in Chemical Engineering, Process Engineering or closely related discipline.
• Chartered Engineer or Incorporated Engineer status with a relevant professional institution, such as IChemE.
• Typically 8–10+ years’ relevant process design experience.
• Background must be from water, wastewater and/or biosolids/sludge treatment design.
• Proven ability to act as process discipline lead or senior technical lead on multidisciplinary projects.
• Strong technical expertise in water/wastewater treatment process design, including process selection, mass balance, process capacity, PFDs, P&IDs and design basis development.
• Practical experience using process modelling/simulation packages such as BioWin, SUMO, Dynamizu or equivalent.
• Strong understanding of UK water industry standards, CDM 2015, process safety, safety‑by‑design, regulatory drivers and common delivery models.
• Confident client‑facing communicator with experience leading workshops, technical reviews and design discussions.
• Experience mentoring or managing engineers and supporting technical capability development.

Responsibilities

• Lead process design delivery on multidisciplinary water/wastewater treatment projects across the full design lifecycle.
• Act as process technical lead on projects, owning design strategy, treatment process selection, key decisions, interfaces, risks and quality of deliverables.
• Review and approve process calculations, mass balances, PFDs, P&IDs, basis of design reports, specifications, technical notes, models and supplier/contractor submissions.
• Lead process modelling and simulation activities using tools such as BioWin, SUMO, Dynamizu or equivalent packages.
• Lead optioneering, process capacity assessments, value engineering, design reviews, HAZOP/SWIFT, commissioning strategy and performance testing input.
• Drive multidisciplinary coordination across Mechanical, EICA, civil/structural, architectural, MEP, construction, commissioning and operations teams.
• Promote lean and digitally enabled delivery through standardised tools, process models, automation, data analysis and reusable templates.
• Provide technical assurance and support project managers with technical risk, scope, resourcing, programme and change control.
• Mentor and manage engineers where appropriate, supporting recruitment, development and chartership progression.
• Contribute to bids, client engagement, opportunity shaping and growth of the process capability.

Skills

Process design lead

Mentoring

Client engagement

Multidisciplinary teamwork

Education

BEng/MEng in Chemical/Process Engineering

Chartered Engineer (IChemE) or Incorporated Engineer

Tools

BioWin

SUMO

Dynamizu

Job description

Egis is expanding its UK Water team and seeks a Principal Process Engineer to shape major water and wastewater projects across the UK. The role offers hybrid working in London, Bristol, or Manchester and rapid progression within a high-growth environment.

You will lead process design, mentor engineers, and drive innovation across AMP‑8, SROs and related programmes, collaborating with mechanical, civil, and operations teams for robust, sustainable solutions.