Senior Process Engineer

Job description

Aqua Consultants is looking for an experienced Senior or Principal Process Engineer to strengthen our growing Water Engineering team. You’ll play a pivotal role delivering water and wastewater schemes for UK water companies, while also supporting wider utilities and infrastructure projects.

You will act as a trusted process engineering authority, leading the development of compliant, innovative and sustainable treatment solutions across the project lifecycle.

Key responsibilities:

• Provide expert process input into water and wastewater design and delivery
• Act as a process subject matter expert and technical leader within Aqua
• Carry out capacity assessments for treatment works and develop process options
• Undertake process calculations, gap analysis and consent compliance assessments
• Develop mass balances, P&IDs, control philosophies and commissioning strategies
• Lead and participate in HAZOP, HAZID and HAZCOM studies
• Assess potable water treatment, raw water deterioration and network risks
• Develop process solutions through outline and detailed design
• Produce high‑quality technical reports and design documentation
• Collaborate closely with costing and commercial teams to develop viable options
• Manage client liaison, progress reporting and technical coordination
• Support project delivery through troubleshooting, commissioning and optimisation
• Promote best practice in process design, safety, operability and environmental performance
• Mentor and develop graduate, consultant and senior engineers
• Attend stakeholder meetings, workshops and site visits across the UK

About You:

• Accredited degree in Chemical, Environmental or Process Engineering
• Chartered member of a relevant professional institution (essential)
• Strong experience within water and/or wastewater treatment
• Confident developing mass balances, optioneering studies and optimisation plans
• Experience working in multi‑disciplinary consultancy teams
• Excellent stakeholder, client and communication skills
• Able to lead technical workstreams and support project delivery
• Practical site experience (sampling/jar testing desirable)
• Able to consider carbon, sustainability and environmental impacts
• Comfortable working independently and providing technical leadership
• Full UK driving licence and right to work in the UK

What We Offer:

• Competitive salary + discretionary bonus
• Company pension & salary sacrifice scheme
• 25 days annual leave + bank holidays + option to buy more
• Company laptop and mobile phone
• Professional membership fees paid
• Ongoing training and clear career progression
• Life assurance (4x salary)
• Employee Assistance Programme (GP, physio & mental health support)
• Medicash healthcare cash plan
• Enhanced maternity, paternity and adoption pay
• Refer‑a‑friend incentive

Extra information

Status

Open

Education Level

Secondary School

Location

United Kingdom

Type of Contract

Full-time jobs

Published at

08-05-2026

Profession type

Management

Full UK/EU driving license preferred

No

Car Preferred

No

Must be eligible to work in the EU

No

Cover Letter Required

No

Languages

English