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Posted Date:  7 Apr 2026
Posting End Date:  21 - Apr - 2026
Location:  Derbyshire
Company:  Severn Trent Water
Department:  Asset Intelligence
Salary (£):  Starting from £50,000

Principal Modelling Engineer

 

 

We’re more than just a water company. We're dedicated to making a positive impact on the environment, sustainability, and the communities we serve. By joining us, you’ll work with the latest technologies, driving forward-thinking projects that enhance and protect national infrastructure, making a real difference to the communities we serve.  

With nearly 10,000 colleagues, we're looking for more brilliant people who are passionate about sustainability, eager to innovate, and ready to turn challenges into opportunities for a better future. 

 


LET’S CUT STRAIGHT TO IT

We’re looking for a Principal Modelling Engineer to join our AI&I Hydraulic Modelling Team, playing a key role in maintaining, enhancing, and assuring the quality of our wastewater network models. You’ll lead modelling activities across multiple projects, support root cause analysis for pollution and flooding events, and ensure models meet Severn Trent Water’s standards.

You’ll also collaborate closely with our Data Science & Modelling teams to explore innovative approaches—combining hydraulic modelling, AI, and machine learning to deliver richer insights.

What You’ll Be Doing

  • Leading hydraulic modelling work, including model build, updates, verification, audits, and fitness-for-use assessments.
  • Managing Sewerage Management Plan consultants and ensuring all model outputs meet STW standards.
  • Conducting root cause analysis for flooding and pollution investigations.
  • Scoping and managing asset, flow, and catchment surveys.
  • Reviewing and approving technical work carried out by the team and external partners.
  • Presenting to internal and external stakeholders (EA, LLFA, customers).
  • Mentoring junior modellers and contributing to technical innovation and quality assurance improvements.

 


You'll be base out of our head office in Derby, Raynesway within our Asset Management Modelling team. With this being such a critical role, we’re looking for someone who can join us 37 hours a week.


WHAT WE’RE LOOKING FOR

You’ll have strong experience in wastewater network modelling and a solid understanding of hydraulic modelling principles.

You should bring:

  • Experience using InfoWorks ICM and GIS tools.
  • Proven ability in model build, updates, verification, and 1D/2D catchment modelling.
  • Strong grasp of hydraulics, rainfall/runoff processes, and flow survey planning.
  • Knowledge of wastewater network design, operation, and pollution mechanisms.
  • Clear analytical skills and the ability to communicate insights effectively.

Desirable:

  • Experience in Sewerage Management Planning and/or river water quality modelling.
  • Understanding of WFD standards, UPM Manual, and wastewater construction methods.

 

Skills and experience are important, but character, positivity, and a caring attitude matter too. We welcome and celebrate diverse individuals, knowing they help us better serve our communities. We seek people who get involved, want to be part of something bigger, and make a difference because they care. 


HOW WE’LL REWARD AND CARE FOR YOU

Working here isn’t just a job. You can build a career at Severn Trent. We’ll reward you for it, too. We have a range of benefits that recognise great work, and award-winning training to help you reach your potential. And we’ll also help you play your part in looking after the environment and the communities where we live.

With that in mind, here are just some of our favourite's perks that you’ll get being part of the Severn Trent family: 

  • 28 days holiday + bank holidays (and the ability to buy/ sell up to 5 days per year)  
  • Annual bonus scheme (of up to £2,250 per annum based on company performance)  
  • Leading pension scheme – we will double your contribution (up to 15% when you contribute 7.5%)  
  • Sharesave – the chance to buy Severn Trent Plc shares at a discounted rate  
  • Dedicated training and development with our ‘Academy’  
  • Electric vehicle scheme and retail offers
  • Family friendly policies and two volunteering days per year   

 


LET’S GO

We can't wait to hear from you! Have an updated CV ready and spare five minutes to apply. We'll let you know the outcome after the closing date, so keep an eye on your phone and emails.

 

Apply now »