Principal Waste Water Process Engineer

Join to apply for the Principal Waste Water Process Engineer role at AtkinsRéalis.

Shape the future of our cities and environments. Are you ready to take up a vital role in shaping some of our exciting projects? Join our talented team, where everyone has a voice, and together we face our clients' problems head‑on. We offer a diverse and inclusive work environment that values world‑class talent in a culture of equality and support.

We support flexible and remote working, tailored to you—from reduced weeks to additional leave during school holidays. If you are returning from a career break, let us help you transition back into the workplace.

As a Principal Waste Water Process Engineer, you will drive every aspect of process engineering on transformational programmes for critical UK infrastructure, with opportunities on iconic projects at home and abroad.

Your purpose

• Lead a team to undertake technical design work following relevant design standards and codes, delivering high‑quality outputs.
• Prepare briefs, scopes of work and contribute to bid proposals.
• Manage time and budgets to meet key project milestones and programmes.
• Work closely with teams in the UK and overseas to deliver integrated design solutions.
• Adhere to quality assurance standards in design.

What you can bring

• Chartered Chemical / Process Engineer (preferably IChemE or CIWEM).
• Experience in leading design delivery, including multidisciplinary design.
• Fundamental understanding and experience of integrated waste‑water and bioresources treatment processes.
• Design and/or operational experience of main process unit operations: primary, secondary, tertiary treatment; bioreources treatment and disposal; odour and energy management.
• Experience of process safety techniques (HAZOP / DSEAR), capital and operational cost assessments, whole‑life carbon assessments and knowledge of UK environmental regulations.
• Awareness of process modelling techniques and software, e.g. BioWIn, SUMO.

Why work for AtkinsRéalis?

We are ranked in LinkedIn’s Top 25 Companies and the Times Top 50 employers for women. Our Infrastructure team uses innovation and data to help clients deliver end‑to‑end projects and programmes. We are committed to engineering better for people and planet, supporting net‑zero programmes and community housing initiatives. Our active employee networks and community outreach programmes foster inclusion for all.

Security clearance

This role may require security clearance and offers of employment will be dependent on obtaining the relevant level of clearance. If this is necessary, it will be discussed at interview. The vetting process is delivered by United Kingdom Security Vetting (UKSV) and may require proof of residency in the UK for 5 years or longer. If applying to this role please do not include details of any current or previously held security clearance in your application.

We are committed to promoting a diverse and inclusive community—a place where we can all be ourselves, thrive and develop. As an Equal Opportunities Employer, we value applications from all backgrounds, cultures and abilities.

Seniorities & details

• Seniority level: Mid‑Senior level
• Employment type: Full‑time
• Job function: Management and Manufacturing