Assistant Wastewater Network Modeller

Mott MacDonald Group; Cardiff; Hybrid; GBP 45,000 - 65,000; Full time

Benefits offered by this job

Private medical insurance

Employee ownership

Life assurance

Income protection

Flexible benefits

Generous holiday

Job summary

Mott MacDonald Ltd. is seeking a Wastewater Modeller to join the UK & Europe-wide team. You will work on wastewater network modelling, drainage, and water quality projects, using InfoWorks ICM and GIS alongside automated tools.

The role offers hybrid working and opportunities to develop technical leadership across national programmes. You will collaborate with experienced specialists on projects including DWMPs, resilience, and environmental improvements, with a focus on climate-resilient

Qualifications

• Qualified candidates should have a good working knowledge of InfoWorks ICM and GIS packages
• Relevant degree qualification is required
• Experience on Wastewater Networks Projects is desirable

Responsibilities

• Undertake model build and calibration/verification of catchment models in InfoWorks ICM
• Model options to resolve sewer flooding and sewer overflow needs in InfoWorks ICM
• Use GIS to extract data for the activities and create basic drawings to scope surveys required for Model Build and Flow Monitoring
• Review survey data for completeness and consistency
• Prepare emails, reports and presentations

Skills

InfoWorks ICM knowledge

GIS proficiency

Communication skills

Education

Relevant degree

Tools

InfoWorks ICM

GIS

FME

Power BI

Python

Ruby

VBA

Job description

Location/s: Brighton, Reading, Bristol, Cardiff, Edinburgh; UK

Mott MacDonald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices.

We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance – we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.

Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you’re surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee-owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued. Whatever your ambition, Mott MacDonald is where people come to be brilliant.

About the Division

The Water Utilities Division is Mott MacDonald’s centre of excellence for responding to the UK and Ireland's water and wastewater challenges. The work we do is at the forefront of ensuring safe water supplies for future generations, preventing urban flooding, and improving the health of our rivers and coastal environments. Our multi-disciplinary teams provide a variety of services throughout the full project life cycle, from advisory services and feasibility studies to outline and detailed design. Together, we deliver best-in-class solutions to our clients while offering diverse and technically stimulating opportunities to our people.

Overview of the role

Come and join our UK & Europe-wide Wastewater Network Modelling Team, delivering some of the water industry's most challenging and high-profile projects for clients including Dŵr Cymru Welsh Water, Southern Water, Thames Water, Uisce Éireann, United Utilities and Wessex Water. Our team is at the forefront of digital innovation, using industry-standard tools such as InfoWorks ICM, GIS and FME, together with bespoke automation solutions, to improve efficiency and deliver better outcomes for our clients.

You will work alongside experienced technical specialists and project leaders on nationally significant programmes covering wastewater network modelling, water quality modelling, storm overflow reduction, Drainage and Wastewater Management Plans (DWMPs), network resilience and environmental improvement schemes. Through this work, you'll help shape more sustainable, climate-resilient water infrastructure and support improvements to river and bathing water quality. Whether working on standalone modelling studies or as part of a multidisciplinary team, you'll have the opportunity to develop your career while contributing to projects that deliver meaningful environmental and societal benefits.

Key Responsibilities and duties include:

• Undertake model build and calibration/verification of catchment models in InfoWorks ICM
• Model options to resolve sewer flooding and sewer overflow needs in InfoWorks ICM
• Use GIS package to extract relevant data for the above activities and to create basic drawings to scope surveys required for Model Build and Flow Monitoring
• Review survey data for completeness and consistency
• Prepare emails, reports and presentations

Candidate specification

Essential:

• Qualified candidates should have a good working knowledge of InfoWorks ICM and GIS packages
• Relevant degree qualified
• Experience working on Wastewater Networks Projects
• Proficient in Microsoft Word, Excel and PowerPoint
• Good communicator and able to enter into technical discussions in a logical and coherent fashion in both oral presentations and written reports

Desirable:

• Familiarity with FME, Power Bi and / or programming skills in languages such as Ruby, VBA or Python would be advantageous
• Experience in the UK Water Sector

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.

AI Usage

At Mott MacDonald, we see the value AI can bring, but we take a people-first approach to hiring. While AI tools can help candidates prepare and build confidence, every application and hiring decision is reviewed by our recruitment and hiring teams. We encourage the responsible use of AI while ensuring we get to know the real person behind the application.

Accessibility

We want you to feel supported and able to perform at your best throughout our recruitment process. If there is anything we can do to make applying or interviewing with us more accessible, please contact us at [e-mail] and we’ll be happy to discuss how we can help.

We offer some fantastic benefits including:

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 every day 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 program, 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.
• 10 days additional paid leave for Armed Forces Reservists and Cadet Force Adult Volunteers.
• 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.
• We offer policies and dedicated support to help military families balance service life with career and wellbeing.

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.
• We are proud signatories of the Armed Forces Covenant and Gold Award holders in the MOD Employer Recognition Scheme, supported by our dedicated internal Armed Forces Network.
• Make a difference within our communities through our social outcomes.