Senior Wastewater Network Modeller

Mott MacDonald; Reading; Hybrid; GBP 52,000 - 75,000; Full time

Benefits offered by this job

Private medical insurance

Pension scheme (matched contributions)

Life assurance

Income protection

Flexible benefits

Annual bonus schemes

Employee ownership

Job summary

Mott MacDonald is seeking a Senior Wastewater Network Modeller to join our Reading team on UK projects. You will lead modelling work from feasibility to detailed design, collaborating with clients to interpret outputs and drive technical excellence.

You’ll mentor graduate modellers, manage survey specifications, and contribute to technical reports and business development while leveraging hybrid working arrangements.

Qualifications

• Strong communication skills and ability to collaborate with clients on wastewater modelling projects.
• Proven ability to deliver projects from feasibility through detailed design using InfoWorks ICM.
• Advanced Excel (Pivot Tables) and PowerBI skills; programming in VBA or Python is advantageous.

Responsibilities

• Deliver wastewater infrastructure projects of varying sizes.
• Mentor graduate modellers and support their development.
• Lead model build, verification and optioneering tasks as required.
• Prepare technical reports and presentations.

Skills

Strong communication skills

Programming (VBA/Python)

Project management

Education

Chartered with ICE or CIWEM

Tools

InfoWorks ICM

GIS packages

Job description

Overview Of The Role

We have an exciting opportunity for a Senior Wastewater Network Modeller to join our team of innovative and motivated network modellers, engineers and project managers, delivering projects across the UK.

We are looking for a driven, experienced individual who wants to progress their career, with a desire to evolve within Mott MacDonald, and to mentor and develop others.

As a Senior Modeller, you’ll provide key technical inputs on a diverse range of UK wastewater infrastructure projects, from feasibility through to detailed design. Our senior modellers are a key part of our modelling community and have the opportunity to contribute to internal innovation sprints, to be involved in external conferences, drive the direction of our sub-sector at a strategic level and contribute to business development.

Key Responsibilities and Duties

• Delivering wastewater infrastructure projects of varying sizes
• Collaborating closely with our clients to ensure they understand model outputs and processes
• Mentoring and training of graduate modellers and providing guidance to support their professional development
• Specification and management of flow surveys
• Undertaking a checking and/or technical lead role of model build, verification and optioneering projects
• Completing complex modelling tasks where required
• Contributing and checking technical reports and presentations
• Developing technical calculation outputs when needed
• Opportunity to project manage infrastructure projects, if interested. This will involve being responsible for programme, commercial performance and technical excellence

Mott MacDonald offers a highly innovative and collaborative environment within which to further develop your career. We can offer development in technical, management or client‑facing directions, or a combination thereof – you will have control of your own career path and great prospects for career progression as the business continues to grow.

Candidate Specification

• Ability to be a team player and develop relationships at all levels
• Working collaboratively with clients as delivery lead, planning and delivering wastewater modelling projects of varying sizes
• Strong communication skills
• Qualified candidates should have a strong working knowledge of InfoWorks ICM and GIS packages
• Project Management experience and skills would be advantageous but not required
• Chartered with a relevant professional institution (i.e. ICE or CIWEM)
• Excellent skills in spreadsheet data analysis (i.e: using MS Excel pivot tables or PowerBI)
• Programming skills in languages such as VBA or Python would be advantageous

UK Immigration

Mott MacDonald Ltd. are not currently offering sponsorship to candidates under the Skilled Worker visa route in the UK. This decision is as a consequence of the changes made to the Skilled Worker route by the UK Government in April 2024. We continue to welcome applications from candidates who are eligible for alternative immigration routes in the UK, that do not require sponsorship as a Skilled Worker now or in future.

Agile Working

At Mott MacDonald, we believe it makes business sense for you and your manager to choose how you can work most effectively to meet your client, team, and personal commitments. We offer a hybrid working policy that embraces your well‑being, flexibility, and trust.

Equality, Diversity, and Inclusion

We put equality, diversity, and inclusion at the heart of our business, seeking to promote fair employment procedures and practices to ensure equal opportunities for all. We encourage individual expression in our workplace and are committed to creating an inclusive environment where everyone feels they can contribute.

Accessibility

We want you to perform your best at every stage in the recruitment process. If you are disabled or need any support to enable you to apply or attend an interview, please contact us at [e-mail] and we will talk to you about how we can support you.

Benefits

Financial Wellbeing

• We match employee pension contributions between 4.5% and 7%.
• Life assurance equal up to 4 x your basic salary, with an option to increase the level of cover to 6 x your salary.
• Our income protection scheme provides a financial benefit, as well as absence and return to work support due to long‑term illness or injury.
• Flexible benefits, including increased life assurance cover, critical illness insurance, payroll saving and will writing.
• As an independently owned business we share the financial success of the business with all our colleagues in various ways including annual bonus schemes.

Employee Ownership

• Our employee ownership model means no external investors, just us, creating a culture of shared success.
• Our employees have a stake and a voice in our business, giving them a direct connection to our success through our personal and group performance bonuses.
• As your career grows, so does your stake, recognising your long‑term impact and contribution.
• Your voice matters, with the opportunity to connect directly with senior leadership through formal channels to help shape our future.
• For our senior roles you will have a direct pathway towards ownership from day one.

Health and Wellbeing

• Private medical insurance for all UK colleagues.
• Health cash plan to support you with everyday health costs and treatments.
• Access to Peppy, providing free support from menopause experts for all UK colleagues.
• A variety of wellbeing support is available through our comprehensive wellbeing programme, including access for you and your family.
• Ability to flex your salary to opt into a wide range of health benefits, many of which can be extended to your family too.

Lifestyle

• A minimum of 33‑35 days holiday each year, inclusive of public holidays and dependent on level, with the ability to buy or sell leave through our flexible benefits programme.
• Holiday entitlement increased to a minimum of 35 days after 5 years’ service.
• Variety of employee saving schemes and discounts from high‑street retailers.

Enhanced Family and Carers Leave

• Enhanced family leave policies, including 26 weeks paid maternity and adoption leave, and two weeks paid paternity/partner leave.
• Our shared parental leave matches maternity leave meaning we pay up to 24 weeks at full pay.
• Up to five additional days leave are provided for those with significant caring responsibilities, two of which are paid.

Learning and Development

• Primary annual professional institution subscription.
• A broad range of opportunities to enhance both technical and soft skills through mentoring, formal training, and self‑development options.

Networks, Communities, and Social Outcomes

• Join a wide range of groups including our Advanced Employee Networks which support our LGBTQ+, gender, race and ethnicity, disability, and parents/carers communities.
• Make a difference within our communities through our social outcomes.

Contact & Job Details

Location(s): Bristol, Cardiff, Reading, Newcastle, Manchester, Brighton, Edinburgh, Derby, Leeds, London; UK

Contract Type: Permanent

Work Pattern: Full Time

Market: Water

Discipline: Water

Job Ref: 15084

Recruiter Contact: Nicola Coyle