Senior Wastewater Network Modeller — Lead & Mentor

Southern Water; United Kingdom; Hybrid; GBP 36,000 - 60,000; Full time

Job summary

Southern Water is seeking a Senior Wastewater Network Modeller to lead high-quality modelling across risk assessments, growth planning, resilience studies, and optioneering. You will mentor junior modellers and graduates, promoting a collaborative and technically strong team.

You will oversee wastewater modelling using InfoWorks ICM, ensuring models are robust, auditable, and aligned with best practice. You will drive automation and continuous improvement to support resilient networks and

Qualifications

• 5 to 10 years wastewater modelling experience.
• Experience delivering UK-based wastewater projects.
• Chartered or near-chartered status.
• Programming experience (Python or Ruby) is desirable.

Responsibilities

• Lead and deliver wastewater modelling across risk assessments, growth planning, resilience studies and optioneering.
• Mentor junior modellers and graduates, promoting collaboration and technical excellence.
• Quality-check outputs and translate results into actionable engineering recommendations.
• Lead stakeholder engagement with internal teams, clients and regulators.
• Drive process improvement and automation to strengthen digital capability.

Skills

Wastewater modelling

UK based projects

Chartered status

Python

Ruby

Tools

InfoWorks ICM

Job description

Southern Water is seeking a Senior Wastewater Network Modeller to lead high-quality modelling across risk assessments, growth planning, resilience studies, and optioneering. You will mentor junior modellers and graduates, promoting a collaborative and technically strong team.

You will oversee wastewater modelling using InfoWorks ICM, ensuring models are robust, auditable, and aligned with best practice. You will drive automation and continuous improvement to support resilient networks and