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Senior​/Principal Wastewater Modeller; Urban Drainage

Job in Manchester, Hillsborough County, New Hampshire, 03103, USA
Listing for: Sweco UK Ltd
Part Time position
Listed on 2026-07-11
Job specializations:
  • Engineering
    Environmental Engineer, Water Management
Salary/Wage Range or Industry Benchmark: 86932 - 120368 USD Yearly USD 86932.00 120368.00 YEAR
Job Description & How to Apply Below
Position: Senior/Principal Wastewater Modeller (Urban Drainage)

Senior/Principal Wastewater Modeller (Urban Drainage)

Location:

Manchester.

These roles can be worked flexibly, with a minimum of 3 days per week in the office and the option of adjusted start and finish times.

Joining our Urban Drainage Modelling Team will give you the opportunity to contribute to a range of transformative projects. From conducting comprehensive feasibility studies, precise model building and verification, to undertaking surface water management plans and producing development impact assessments, every project is unique.

You will leverage state‑of‑the‑art design software and advanced techniques to create groundbreaking solutions that meet our clients' needs.

What does the role involve?

Working within our Urban Drainage Modelling Team, you will take the lead in delivering a programme of modelling work, primarily being responsible for technical delivery while also managing cost and programme. You will also lead a team of junior modellers and work with clients’ technical teams to satisfy project objectives.

Core duties and responsibilities will include:
  • Working within agreed deliverables, key milestones, project methodology, quality assurance and control strategy.
  • Leading project delivery tasks including engagement with clients’ technical teams.
  • Providing technical guidance, support and training to less experienced colleagues.
  • Developing modelling processes and creating innovative modelling tools.
  • Working on a range of modelling projects for clients in both the public and private sector.
To be successful in this role you will have:
  • Experience in model build and verification of integrated catchment models and/or solution development using Infoworks ICM.
  • Experience of water quality modelling and/or undertaking UPM studies would be advantageous.
  • Experience of GIS (e.g. ArcGIS or Mapinfo) and Infoworks ICM hydraulic modelling software is essential.
  • A track record in mentoring team members less experienced in this field.
  • Experience of managing projects and acting as technical discipline lead on urban drainage modelling/sewage projects is advantageous.
  • Experience in managing modelling teams from a commercial/financial perspective would be beneficial.
  • An understanding of the market and an interest in business development to help expand and diversify our range of clients would also be welcomed.
  • For the Principal role you must be chartered with an appropriate institute (e.g. ICE or CIWEM) or close to achieving chartered status.
What’s in it for you?

This is an exciting time to join Sweco. If you want to be part of a company that is small in all the best ways but large enough to provide a diverse and exciting workload, this job is for you.

You will learn from experienced people who share a passion for working together with our clients to deliver technical excellence and, as you develop, be given the opportunity to work more independently.

If you believe you have the skill set required, are keen to join a business with genuine opportunities for career progression, then we’d love to hear from you.

Equality, Diversity & Inclusion

It’s important to us that all our colleagues thrive at work – we strive to have a friendly and inclusive culture which respects the contribution individuals can bring to Sweco. We aim to promote equality, inclusivity and diversity for everyone.

Here at Sweco we positively 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.

We have signed the Armed Forces Covenant to ensure those who serve or have served, and their families, are treated fairly. To find out more The Armed Forces Covenant – Our Commitments | Sweco UK.

We are also proud to be a Disability Confident Committed employer, and will interview all disabled applicants who meet the essential criteria.

If I have a disability, can I get help (e.g. “reasonable adjustments”) with the application process?

If you’re an applicant with a disability that requires a reasonable accommodation to complete any part of the application process or are limited in the ability or unable to use the online application system and need an alternative method for applying, please contact  for assistance.

In order to address your request the following information is needed:

  • Name
  • The best method for contacting you (Phone or email)
  • The position title
  • Requisition/vacancy number

Upon receipt of this information, we’ll respond to you promptly.

Important note

Please note:

we reserve the right to close vacancies before the advertised closing date.

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Position Requirements
10+ Years work experience
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