Senior Groundwater Modeller


The Yellow Sub Hydro team is seeking a candidate that specialises in groundwater modelling to support the superstar Hydrogeology team. Our ideal person is proficient in AnAqSim and can confidently program in python to implement additional features / analysis of results relating to groundwater outputs. We’re a small team that’s growing fast, if you’re a good communicator and enjoy the dynamic, hands-on environment that comes with scaling up a company – you’ll fit right in!



We are fully committed to gender equality and flexible working and will consider requests for full or part-time working patterns with home based working to suit. A life-work balance (deliberately with ‘life’ first) is essential for a sustainable future. We are seeking a resourceful and self-motivated individual to work collaboratively as part of our team. 


  • BSc qualified (or higher) in Geology, Environmental Geoscience, Environmental Science or similar, or equivalent experience in practice.
  • 5+ years industry experience of geoenvironmental/geotechnical projects.


This is not a conventional business, and it follows that this is not a conventional job opportunity. There will be no neat little box for you to sit in (either physically or metaphorically). This role will be home/remote working in UK with ideal geographies being Wales, Midlands and the Southwest or the London and the Sotheast. We are willing to consider applications from further afield so don't let your geography limit your horizons.



  • Strong groundwater modelling experience
  • Knowledge of and previous experience with 2D and 3D groundwater flow and transport modelling software
  • Strong analytical skills
  • Python programming skills
  • Confident problem solver
  • GIS skills
  • Experienced project manager/ account manager



Why our crew likes working here:

  • B Corp status
  • Triple Bottom Line – People, planet and profit equitably weighed
  • 26 days leave + bank holidays
  • Make impact
  • Wellbeing prioritised
  • Team away days
  • Flexible working
  • Diversity and Inclusion Policies
  • Mental health days
  • Collaboration encouraged
  • Personal development
  • Strong sense of purpose
  • 1% company contribution to the planet


The future is bright, the future is Yellow…what colour is your future?

Register your interest with email CV and a brief cover note explaining WHY (1 page max) to


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UK: (+44) 02920 099 310