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Wastewater Modeller (Assistant to Principal) – Leading Consultancy Projects

Location: Bristol | Hybrid Working

Recruiter: Advance TRS (representing a leading engineering consultancy)

You’ll be involved in developing and applying hydraulic models to understand network performance, support investment planning, and shape future infrastructure solutions for complex wastewater and drainage systems. This role offers exposure to significant industry programmes and excellent scope for progression.

• Build, update, and run computer models to assess wastewater and drainage network behaviour.
• Analyse a wide range of data sources to identify system issues and support decision‑making.
• Contribute to the development of engineering options to improve network performance and environmental outcomes.
• Produce clear outputs including technical notes, summaries, and contributions to project reports.
• Participate in site visits, client discussions, and project meetings.
• Prepare and follow project health & safety documentation.
• Support bid preparation, fee proposals and work planning (Senior/Principal).
• Guide and mentor junior colleagues, contributing to their development (Senior/Principal).
• Drive technical improvements and support innovation across modelling approaches and project delivery (Senior/Principal).

Experience will vary depending on grade, but the ideal candidate will demonstrate some of the following:

• Awareness or experience of wastewater/urban drainage modelling, ideally using InfoWorks ICM (or similar platforms).
• An understanding of GIS tools (e.g., ArcGIS, QGIS, MapInfo) and their use in network modelling or spatial analysis.
• Ability to contribute to feasibility studies and assessments relating to flooding, pollution, capacity, or environmental improvements.
• Confidence working with data, running simulations, and summarising technical findings in concise written formats.
• Ability to liaise effectively with clients, contractors, regulators, and project partners.
• Willingness to learn new tools and systems, with support and training provided at junior levels.

• Understanding of the UK water sector and regulatory drivers.
• Experience constructing, maintaining, and calibrating wastewater network models.
• Experience applying models for planning studies, operational assessment, or solution development.
• Familiarity with model build standards, verification processes, hydraulic analysis, water quality considerations, and catchment planning.
• Exposure to Drainage & Wastewater Management Plans (DWMP) or similar strategic planning programmes.
• Use of advanced tools such as ICM Exchange or automated modelling techniques (advantageous at Principal level).
• Demonstrated ability to oversee technical work, assure quality, and deliver reliable project outputs.
• Experience leading small teams or mentoring modellers.

• Degree in Engineering, Geography, Environmental Science, GIS, or related discipline (or equivalent experience).
• For Technician-level positions: HNC/HND or similar vocational qualifications are welcomed.
• Professional accreditation (or working toward it) is advantageous for senior candidates.

• Opportunity to join a consultancy team involved in major UK and global water projects.
• Hybrid working arrangement with flexibility.
• Clear progression pathways across modelling grades.
• Strong investment in training, professional development, and Chartership support.
• Inclusive and collaborative team culture with access to industry-leading tools and methodologies.

We are an equal opportunity employer and value diversity in our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.