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Wastewater Treatment Design Manager

COWI


Job Location:

Warsaw - Poland

Monthly Salary: Not provided by the employer
Posted: 13 July 2026 (30+ days ago)
Application Deadline: 10 October 2026
Vacancies: 1 Vacancy

Job Summary

Wastewater Treatment Design Manager
Permanent
Hybrid
Wroclaw/Krakow/Gdansk/Warszawa office

Do you want to be a part of a growing Wastewater treatment team Can you collaborate with colleagues across UK and International projects Are you experienced in wastewater treatment projects design management for UK water utility clients Then this could be the next adventure in your career.

Create Solutions that will enable a better tomorrow
To further strengthen our wastewater treatment capability on major infrastructure projects we are seeking an experienced Design Manager to lead the design and technical delivery of wastewater treatment plant projects across the full project lifecycle. The successful candidate will manage multidisciplinary design teams ensure technical compliance and support project execution from concept through commissioning with a strong focus on UK water company frameworks and regulatory environments.

In this role as a Design Manager you will fulfil the role of WWTP Lead and will be responsible for leading the team in developing cutting-edge solutions for the water Industry. This role requires a deep understanding of engineering principles design methodologies and industry regulations. The ideal candidate will have a proven track record of managing design through feasibility outline and detail fostering innovation and collaborating with multidisciplinary teams with specific experience delivering projects for UK water sector frameworks (e.g. AMP cycles).

Furthermore on a day-to-day basis you will:

  • Lead and coordinate the process and detailed design of municipal and/or industrial wastewater treatment plants for UK regulated water utility projects including AMP delivery frameworks ECI and Design & Build (NEC3/NEC4) models.
  • Manage multidisciplinary teams across process civil mechanical electrical and I&C disciplines while reviewing and approving design deliverables calculations drawings and specifications.
  • Ensure compliance with UK and international standards client requirements environmental permits CDM Regulations 2015 and relevant water industry guidance including Sewers for Adoption and Design & Construction Guidance.
  • Provide technical leadership during feasibility tender detailed design construction commissioning and start-up phases including performance optimisation and on-site technical support.
  • Interface with clients regulators contractors UK water companies and delivery partners while managing engineering budgets schedules risks and framework tender submissions.
  • Mentor junior engineers and contribute to technical excellence innovation and capability development within the organisation

Your Skills. Our Team. Together We Design the Future
The first step to thrive in this role is that you are motivated to collaborate with the people around you whether they are colleagues partners or customers. Developing ties with others is something you do by acting respectfully and delivering on your promises. And you never get set in your ways but keep exploring new insights and ways to improve.
On top of that you have:

  • Bachelors or Masters degree in Environmental Civil Chemical or Process Engineering with 10 years of experience in wastewater treatment plant (WWTP) design including projects for UK water utilities.
  • Proven experience leading multidisciplinary design teams on complex WWTP projects with strong knowledge of biological physical and chemical wastewater treatment processes.
  • Good understanding of UK/international standards UK water industry frameworks EA/Ofwat requirements and delivery models including EPC Design & Build and NEC3/NEC4 contracts.
  • Experience with digital delivery and engineering tools such as BIM (ISO 19650) 3D design platforms including Autodesk Revit and Autodesk Civil 3D and process modelling tools like BioWin and SIMBA would be advantageous.
  • Strong communication stakeholder management and client-facing skills along with an understanding of sustainability carbon reduction and net-zero objectives within the UK water sector.

A place to work and so much more

At COWI we work together with our customers to shape a sustainable and liveable world. We do it by applying our knowledge and curiosity and sometimes even our courage to create the solutions the world needs today to enable a better tomorrow. We support our customers transition towards increased sustainability. We strive to lead by example by embedding environmental management social responsibility and good governance into our business practices and the options we provide to our customers.

We value differences and development and cultivate an environment of belonging and having fun. Because that is what brings out the best in you at work and at home.

With offices primarilylocatedin the Nordic region the UK NorthAmericaand India we are currently more than 7500 people who bring theirexpertisein engineering architectureenergyand environment into play.

Got more questions
If you have any unanswered questions about the role or what we have to offer please reach out to Agnieszka Talalas Head of Engineering Agnieszka Cytowska Head of Discipline Mateusz Salawa Head of Discipline or Nancy Wadhwa Talent Acquisition Specialist

Get to know us even better at our website where you can learn more about our projects our strategy what we want to achieve and what life is like at COWI.

Equal opportunity employer
COWI provides equal employment opportunities to all employees and applicants for employment without regard to race colour religion sex national origin age disability or addition to federal law requirements COWI complies with applicable state and local laws governing non-discrimination in employment in every location in which the company has facilities. This policy applies to all terms and conditions of employment including recruiting hiring placement promotion termination layoff recall transfer leaves of absence compensation and training.

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Required Experience:

Manager


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