Principal​/Associate Wastewater Modeller

Job Description

About the role

At WSP we’re investing in talented leaders to shape the future of our water environment. As an Associate/Technical Director you’ll guide teams, strengthen our technical capability, and influence delivery of industry‑leading outcomes for clients such as Severn Trent, Scottish Water Horizons, Welsh Water, and Southern Water.

• Lead the development of our urban drainage modelling capability, ensuring the team remains ahead of the curve on evolving methods, tools, and standards.
• Support the team lead with the day‑to‑day management of our technical delivery team.
• Provide authoritative technical input on urban drainage projects, working closely with our wastewater team to support innovative and efficient project delivery.
• Apply independent professional judgement to solve complex engineering challenges and drive innovation.
• Build strong, trusted client relationships and facilitate internal and external project meetings.
• Contribute to business development, proposals, and strategic growth opportunities.
• Represent WSP in industry forums and conferences.
• Share knowledge widely, contributing to the development of the wider water team.

• A relevant degree and chartered status, or a significantly progressed journey toward qualification with ICE, IEI, IoW, or CIWEM.
• Clear and successful experience of wastewater hydraulic modelling (e.g., Info Works ICM) and ability to check the technical outputs of others prior to issue.
• Good working knowledge of Water Industry Specifications, the Code of Practice for the Hydraulic Modelling of Urban Drainage Systems, and relevant British Standards.
• Strong presentation, written and verbal communication skills.

Work‑life balance – Hybrid working policy, flex time, “WSP My Hour” and part‑time options.

Inclusivity & Belonging – Commitment to diversity and inclusion, employee resource groups.

Health & Wellbeing – Thrive programme, virtual GP service, reasonable workplace adjustments, gymflex scheme, menopause support.

Development – Training, mentoring, chartership, flexible learning.

We encourage applications from suitably qualified and eligible candidates regardless of sex, race, disability, age, sexual orientation, gender reassignment, religion or belief, marital status, pregnancy or maternity/paternity. As a Disability Confident leader, we interview all disabled applicants who meet the essential criteria. Please let us know if you require any workplace adjustments in support of your application.