This list contains only the countries for which job offers have been published in the selected language (e.g., in the French version, only job offers written in French are displayed, and in the English version, only those in English).
At Mitie, our people are our greatest strength, and our promise is to create places where people can thrive and be their best every day. We're looking for a Technical Process Design Manager to join our growing wastewater engineering team, playing a key role in designing and optimising industrial effluent treatment systems across a diverse project portfolio. Mitie is an accredited Real Living Wage Employer, ensuring all roles are paid at or above the independently calculated Real Living Wage.
Job Responsibility:
Design full industrial effluent treatment plants from feasibility through to detailed design
Develop and optimise process flow diagrams (PFDs) and P&IDs
Specify equipment including pumps, tanks, chemical dosing systems, and filtration technologies
Develop and optimise chemical dosing regimes (e.g. pH correction, coagulation, flocculation, nutrient dosing)
Undertake process calculations, mass balances, and performance modelling
Support project teams during installation, commissioning, and troubleshooting phases
Liaise with clients to understand wastewater characteristics and treatment requirements
Ensure all designs comply with environmental regulations and industry standards
Contribute to innovation, continuous improvement, and technical excellence within the engineering team
Requirements:
Degree‑qualified in Chemical Engineering, Process Engineering, Environmental Engineering, or similar discipline
Proven experience in industrial wastewater or effluent treatment process design
Strong understanding of chemical dosing systems and treatment chemistry
Experience with treatment technologies such as DAF, MBBR, SAFS, membrane systems, and dewatering screw presses (or similar)
Ability to produce and interpret PFDs and P&IDs accurately
Strong analytical, problem‑solving, and technical decision‑making skills
Comfortable working independently and collaboratively within multidisciplinary project teams
Excellent communication skills with both technical and non‑technical stakeholders
What we offer:
Access to Mitie's Choices lifestyle benefits platform, including extra holiday purchase, dental and critical illness cover, and technology schemes
Virtual GP access for you and your household
Financial wellbeing support through Salary Finance
MiDeals high‑street discounts, cycle‑to‑work scheme, and gym offers
Life cover up to 4× salary, enhanced pension contributions, save‑as‑you‑earn scheme, and the Mitie Matching Share Plan (with potential free shares)
Recognition through Mitie Stars, with monthly cash prizes and an annual £10,000 award
Strong focus on career development, training, and long‑term progression