Principal Wastewater Modeller

Job Title:

Principal Wastewater Hydraulic Modeller

Salary: £55,000 to £70,000 (dependent on experience)

Location:

Manchester, Leeds, London, Bristol, St Albans, Basingstoke, Chesterfield, Belfast - Hybrid / Flexible Working

Type:
Permanent, Full Time

Our client is seeking a Principal Wastewater Hydraulic Modeller to join their dynamic, multidisciplinary Water Team. You will deliver key water and wastewater infrastructure projects across the UK and internationally, including flood alleviation schemes, pollution reduction initiatives, and integrated design solutions. This is an opportunity to work collaboratively with experts across multiple disciplines, developing comprehensive hydraulic modelling solutions and innovative approaches to Blue‑Green infrastructure.

Our client is a leading UK and international water consultancy, recognised for technical excellence, innovation, and inclusivity. They work with both public and private sector clients, setting industry standards in water and wastewater engineering. The organisation promotes hybrid working, professional growth, and a culture of collaboration, ensuring employees can contribute fully while maintaining work‑life balance.

• Lead hydraulic model build and verification of sewer networks.
• Scope, plan, and oversee integrated modelling projects including flow survey verification.
• Develop catchment-scale strategic solutions for flooding and pollution risks.
• Lead technical innovation, applying new technologies and problem‑solving for clients.
• Prepare and review technical reports, presentations, and documentation.
• Mentor and support team members in their professional development.
• Foster positive client relationships and deliver high‑quality outputs.
• Review hydraulic models, calculations, and technical reports to ensure compliance with specifications.

• Bachelor's degree in Environmental Sciences, GIS, Geography, Civil Engineering, or similar subject.
• Experience in Hydraulic Modelling, GIS, or Data Analysis, particularly ArcGIS or Map Info.
• Knowledge of hydraulic modelling or asset management tools, such as Innovyze ICM or Info Asset.
• Proven experience in water consultancy projects.
• Strong communication and presentation skills to convey technical findings effectively.
• Ability to mentor and collaborate within a multidisciplinary team.

• Competitive salary (£55,000-£70,000)
• Flexible hybrid working model
• Professional development and career growth opportunities
• Inclusive and collaborative working environment
• Access to technical practice networks and training programmes
• Volunteering days and wellbeing initiatives
• Opportunities to work on high‑profile UK and international projects

• Right to work in the UK or Ireland
• Relevant degree in engineering, environmental science, GIS, or related field

• Lead impactful water and wastewater projects across multiple regions
• Innovate with Blue‑Green and nature‑based solutions
• Influence modelling standards and best practices
• Mentor junior team members and shape team culture

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.