Senior Hydrologist

Location/s: Bristol, Cambridge, Edinburgh, Glasgow, Inverness, Leeds, London, Manchester, Reading, Sheffield; UK

Recruiter contact: Nicola Coyle

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

The Water Consultancy Division is Mott Mac Donald’s centre of excellence for water and wastewater challenges, offering opportunities to work on technically challenging projects that safeguard water supplies and protect our environment.

As a Senior Hydrologist you will work within the Water Resources and Flooding sector, applying hydrology, hydrogeology, water quality, catchment management, climate resilience, hydraulic modelling, flood risk, computational fluid dynamics and related disciplines.

• Low flow assessments and water systems modelling to define the availability of water for supply during droughts
• Implementation of hydrological forecasting systems
• Estimation of changes in climate variables in the future using global or regional projections
• Flood hydrology studies incorporating the impact of climate change
• Hydropower feasibility studies, including the definition of design floods and verification of energy generation
• Climate change risk assessments of assets or portfolios of assets

• Relevant degree level qualification (e.g., hydrology, geography, mathematics, civil engineering, or related discipline)
• Knowledge of low flows hydrology, including rainfall‑runoff modelling or applying UKCP
  18 and CMIP5/6 projections to climate change impact assessments
• Willingness to innovate
• Excellent communication and written skills

• Understanding of regulatory requirements for UK water resources management planning
• Experience with rainfall‑runoff modelling packages such as GR6J, Catch Mod, or PDM
• Experience with water systems modelling tools such as Aquator, WEAP, or Pywr
• Coding/statistical techniques experience

Mott Mac Donald does not currently offer sponsorship for the Skilled Worker visa route. We welcome applications from candidates eligible for alternative immigration routes that do not require sponsorship.

We offer a hybrid working policy that supports well‑being, flexibility, and trust, allowing you to work most effectively for clients, teams and personal commitments.

We put equality, diversity, and inclusion at the heart of our business and encourage applications from individuals of all backgrounds.

We provide reasonable adjustments for disabled candidates or interviewees – please contact us at reaso

• We match employee pension contributions between 4.5% and 7%.
• Life assurance equal up to 4x your basic salary, with an option to increase the level of cover to 6x your salary.
• Income protection scheme, 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.
• Annual bonus schemes sharing financial success.

• No external investors – culture of shared success.
• Employees have a stake and a voice, with direct connection to performance bonuses.
• Stake increases with career growth, recognising long‑term impact.
• Opportunity to connect directly with senior leadership through formal channels.
• Direct pathway to ownership for senior roles from day one.

• Private medical insurance for all UK colleagues.
• Health cash plan for everyday health costs and treatments.
• Access to Peppy – free support from menopause experts for all UK colleagues.
• Wellbeing programme including family support.
• Flexibility to opt into wide range of health benefits, extendable to family.

• Minimum 33‑35 days holiday each year, inclusive of public holidays, with flexible benefits programme.
• 10 days additional paid leave for Armed Forces Reservists and Cadet Force Adult Volunteers.
• Holiday entitlement increases to a minimum of 35 days after 5 years of service.
• Employee saving schemes and…