Chief Process Engineer (Wastewater)

Company: Costain Group PLC

Location: Manchester

Posted: May 7th, 2026

Overview

As AMP8 ramps up, we are looking for a Chief Process Engineer ideally based in the North West of England to join our Asset Optimisation Team and support multiple clients, including United Utilities, Northumbrian Water, and Yorkshire Water. Our team provides wastewater process engineering consultancy to support our clients across the UK to get the very best from their assets and programmes. We are an agile technical team of process engineers working within capital delivery frameworks and on the front line with operational teams to develop innovative, practical and digital process solutions. Our team delivers optimisation studies at feasibility, concept, optioneering and preliminary design stages to mitigate risk, return sites to compliance, or enable low or no build solutions to be provided. You will develop and lead the execution of asset optimisation projects and direct teams to propose, develop, and define process optimisation solutions. This is a home-based role with occasional site/office attendance as per business or client needs so flexibility to travel is required; our Northern office is based in Manchester, so this role will ideally suit someone based in the North West of England.

Responsibilities

Essential – Knowledge, Skills, and Experience

Desirable

Qualifications

Essential

Desirable

About Us

Costain helps to improve people’s lives with integrated, leading edge, smart infrastructure solutions across the UK’s energy, water, transportation and defence markets. We help our clients improve their business performance by increasing capacity, improving customer service, safeguarding security, enhancing resilience, decarbonising and delivering increased efficiency. Our vision is to be the UK’s leading smart infrastructure solutions company. We will achieve this by focusing on blue chip clients whose major spending plans are underpinned by strategic national needs, regulatory commitments, legislation or essential performance requirements. We offer our clients leading edge solutions that are digitally optimised through the following five services which cover the whole lifecycle of their assets: future-shaping strategic consultancy; consultancy and advisory; digital technology solutions; asset optimisation and complex programme delivery. Our culture and values underpin everything we do.

Costain appreciate the time and effort taken when applying for one of our positions but, due to the high volume of responses, we are unable to provide individual feedback on candidates at application phase. We do share individual feedback following an interview. A Disability Confident employer will generally offer an interview to any applicant that discloses they have a disability and meets the minimum criteria for the job as defined by the employer. It is important to note that in certain recruitment situations such as high-volume, seasonal and high-peak times, the employer may wish to limit the overall numbers of interviews offered to both disabled people and non-disabled people. For more details please go to the Disability Confident website: https://www.gov.uk/government/collections/disability-confident-campaign

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