Location
London, Bristol, Manchester (Hybrid)

Hours
Full Time

Salary
Negotiable

About the Role
The UK water sector is entering a period of unprecedented investment and transformation. Egis is rapidly expanding its Water Business in the UK and is building a high-performing Process Engineering team to help shape this next chapter. As a Principal Process Engineer, you will play a meaningful role in delivering major water and wastewater programmes across the UK municipal and industrial sectors. Working within a collaborative, multidisciplinary environment, you will contribute to technically robust, sustainable, and innovative treatment solutions on nationally significant projects. This is a rare opportunity to join at a key stage of Egis’ UK growth journey, helping to establish, shape, and expand a process engineering capability built on global infrastructure expertise and a long-term commitment to the sector.

Key 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. Drive optioneering, process capacity assessments, value engineering, design reviews, HAZOP/SWIFT, commissioning strategy, and performance testing input. Coordinate multidisciplinary teams including Mechanical, EICA, civil/structural, architectural, MEP, construction, commissioning, and operations. 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, supporting recruitment, development, and chartership progression. Contribute to bids, client engagement, opportunity shaping, and growth of the process capability.

About Egis
Egis is a global leader in sustainable infrastructure, with over 25,500 experts across 70+ countries. We design and deliver intelligent infrastructure solutions to address climate challenges and strengthen community resilience. Recognised as a Top Employer 2025, we offer a supportive, inclusive culture driven by sustainability and long-term community impact. Our commitment is reflected in the work of the Egis Foundation, which funds initiatives addressing the climate crisis and promotes responsible, sustainable development worldwide.

Additional Information
This role offers an exciting growth opportunity in a fast-growing UK business with clear and accelerated career progression. We provide a highly competitive reward package, hybrid and flexible working arrangements, 26+ days annual leave plus bank holidays, professional development, chartership support, and global mobility opportunities. Egis is an Equal Opportunities employer welcoming candidates from all backgrounds and committed to building a diverse and inclusive workforce.

Experience
Typically 8–10+ years’ relevant process design experience in 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.

About You
Motivated to lead and shape process engineering capabilities within a fast-growing team. Able to work collaboratively across multidisciplinary teams. Committed to sustainable and innovative infrastructure solutions. Strong leadership and communication skills with a client-focused approach. Enthusiastic about professional development and supporting others’ growth.

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. Right to work in the UK is required.

Desirable Skills / Knowledge
- Deep experience in wastewater treatment, clean water treatment, sludge/bioresources, nutrient removal, water reuse/recycling, process optimisation, chemical dosing, energy recovery, or low-carbon design.
- Experience delivering AMP8, WINEP, SRO, D&B, framework, alliance, or contractor-led projects.
- Advanced capability in BioWin, SUMO, Dynamizu, process model calibration, scenario testing, dynamic simulation, or operational optimisation.
- Experience developing process design standards, calculation tools, modelling workflows, QA processes, or reusable digital templates.
- Experience contributing to recruitment, resource planning, bid writing, technical proposals, client presentations, or new service development.