Senior Wastewater Modeller

Arcadis; Warrington; On-site; GBP 45,000 - 65,000; Full time

Job summary

A global engineering consultancy seeks a Senior Wastewater Modeller in Warrington, England, to develop wastewater models and manage key project aspects. The ideal candidate is skilled in hydraulic modelling, particularly with InfoWorks ICM, and is experienced in client engagement and mentoring. This position offers opportunities to lead innovative projects while fostering a collaborative environment.

Qualifications

• Advanced expertise in hydraulic modelling for wastewater projects.
• Proficient in InfoWorks ICM with advanced data analysis skills.
• Experience in model quality assurance procedures.

Responsibilities

• Develop wastewater models and manage project aspects.
• Conduct technical reviews and oversee model verification.
• Support designers at concept and detailed design stages.
• Manage technical reports ensuring high-quality standards.
• Resolve technical challenges and advance team expertise.

Skills

Hydraulic modelling expertise

Team and stakeholder coordination

Proficient in InfoWorks ICM

Knowledge of HADES

GIS software competency

Model quality assurance

Report-writing

Data analysis in spreadsheets

Coding experience

Education

Chartered membership of ICE or CIWEM

Job description

Senior Wastewater Modeller

Arcadis – Warrington, England, United Kingdom

We are the world’s leading company delivering sustainable design, engineering and consultancy solutions for natural and built assets. With over 36,000 people in more than 70 countries, we are dedicated to improving quality of life and solving complex challenges together.

Role Description

Our Water Management team is seeking a Senior Wastewater Modeller. In this role you will develop wastewater models, manage key project aspects, and work closely with clients to build and expand Arcadis’s project portfolio through strategic client interactions. Collaboration, proactive problem‑solving, and creative thinking are central to our team’s approach and will be a fundamental part of your responsibilities.

Our Water team addresses the UK’s most technically demanding projects, partnering with leading water companies and contractors to deliver innovative solutions. Projects focus on flooding challenges, reducing storm overflow pollution, and improving network resilience while ensuring compliance with UK regulatory requirements such as WINEP.

This position is ideal for a motivated, independent professional looking to advance their career while mentoring and nurturing others. You will take a leadership position in client engagement and management, ensuring technical deliverables align with client expectations and fostering opportunities for continued collaboration and growth.

Role Accountabilities

• Deliver a range of wastewater infrastructure and non‑infrastructure modelling projects, effectively managing tasks of various scales.
• Conduct technical reviews of wastewater models, oversee model build and verification of sewer networks, survey specifications and management, and develop strategic solutions to mitigate flooding and reduce CSO spills.
• Provide support to designers at concept outline and detailed design stages.
• Review and enhance technical reports and presentations to uphold high‑quality standards.
• Resolve technical modelling challenges on projects and contribute to advancing the team’s technical expertise.
• Ensure project components, including reports, drawings, specifications, and studies, comply with relevant standards and project requirements.
• Collaborate closely with clients, providing clear explanations and ensuring they understand model outputs and processes.
• Support and guide junior team members, fostering a collaborative and supportive work environment.
• Assist with preparation of bids, including narratives, cost estimates and programmes.
• Coordinate project elements, managing resource allocation, quality assurance, subcontractor interactions, and client feedback.
• Work alongside specialists from other engineering and environmental disciplines to ensure project integrity.
• Liaise effectively with the Project Director or Manager and the client to support project progress.
• Foster a collaborative work environment by actively supporting the professional development of both yourself and your team, guiding junior members to reach their full potential.

Qualifications & Experience

• Advanced expertise in hydraulic modelling for a range of wastewater infrastructure and non‑infrastructure projects.
• Skilled in team and stakeholder coordination and management.
• Proficient in InfoWorks ICM.
• Knowledge of HADES would be advantageous.
• Competent in using relevant GIS software packages.
• Chartered member of a relevant professional institution would be desirable (e.g., ICE or CIWEM).
• Proven experience in model quality assurance procedures.
• Strong report‑writing skills.
• Advanced abilities in spreadsheet‑based data analysis.
• Coding experience desirable.

Why Arcadis?

We can only achieve our goals when everyone is empowered to be their best. We believe everyone’s contribution matters. It’s why we are pioneering a skills‑based approach, allowing you to harness your unique experience and expertise to carve your career path and maximize the impact we can make together.

You’ll do meaningful work, and no matter what role, you’ll be helping to deliver sustainable solutions for a more prosperous planet. Make your mark on your career, your colleagues, your clients, your life and the world around you.

Our Commitment to Equality, Diversity, Inclusion & Belonging

We want you to bring your best self to work every day. Our ambition is to be an employer of choice and provide a great place to work for all our people. We believe that by working together, diverse people with different experiences develop the most innovative ideas. Equality, diversity and inclusion are at the heart of how we improve quality of life, and we work closely with our people across six ED&I workstreams: Age, Disability, Faith, Gender, LGBT+ and Race.