Description £56,509 - £62,159 - the band minimum is the normal starting pay for those new to a role. In exceptional circumstances, where relevant skills and experience can be demonstrated, a higher starting salary may be offered. We will give full consideration to requests for flexible and part-time working, such as reduced hours, compressed hours or job sharing. We also offer hybrid working and recognise the many benefits this brings. The nature of the role will determine if flexible and hybrid working options are possible. Interview date - 10th July 2025 British Antarctic Survey (BAS) is looking for an exceptional UKESM Sea Ice Model Developer to join our Ice Dynamics and Palaeoclimate team. BAS delivers and enables world-leading interdisciplinary research in the Polar Regions. We employ experts from many different professions to carry out our science as well as keep the lights on, feed the research and support teams and keep everyone safe! Working at BAS is rewarding. Our skilled science, operational and support staff based in Cambridge, Antarctica and the Arctic, work together to deliver research that uses the Polar Regions to advance our understanding of Earth as a sustainable planet. Through our extensive logistic capability and know-how, BAS facilitates access for the British and international science community to the UK polar research operation. Numerous national and international collaborations, combined with excellent infrastructure, help sustain a world-leading position for the UK in Antarctic affairs. BAS is a component of the Natural Environment Research Council (NERC), which is part of UK Research and Innovation - www.ukri.org. As a valued member of our team, you'll be eligible for the following benefits: 30 days annual leave plus bank holidays and 2.5 privilege days Excellent Civil Service pension (with 26% or more employer contribution, depending on your band) 24/7 access to an employee assistance programme (EAP - including support with physical, mental, social, health, and financial issues) Flexible and family-friendly working opportunities Cycle to work scheme Access to discounted shopping on a range of retail, leisure, and lifestyle categories and much more You'll be joining our UKESM and SI3 development sub-group within the Ice Dynamics and Palaeoclimate Team, working at the cutting edge of polar climate and Earth system modelling. You'll help us to deliver a new tracer framework within the SI3 sea ice model, fully integrated into the UK Earth System Model (UKESM), supporting simulations that evaluate Arctic geoengineering interventions aimed at thickening sea ice. Within the role, there will be an opportunity to develop your own independent research programme aligned with your modelling expertise, and to contribute to peer-reviewed publications, while working closely with a project PhD student. Current projects the team are working on include the UKESM development programme, sea ice model improvements, and the Aria-funded ECO-ICE project assessing the potential of climate interventions in the Arctic. Some of your main responsibilities will include: Developing and implementing new physical processes and tracers in the SI3 sea ice model Ensuring model integration into the UKESM trunk and community availability Designing and running UKESM ensemble simulations for Arctic geoengineering evaluation Supporting a PhD student and collaborating on model configuration and analysis Enabling downstream diagnostics for ECO-ICE WP3 and WP4 Collaborating with the Met Office, CPOM, and other NERC partners For the role of UKESM Sea Ice Model Developer, we are looking for somebody who has: • A PhD or equivalent experience in physics, atmospheric science, Earth sciences, mathematics, or numerical engineering Experience with UK Earth System Models, ideally UKESM Expertise in sea ice and polar climate processes Strong programming and numerical skills, including FORTRAN and use of Linux/Unix Demonstrated ability to solve model-related problems Excellent communication and collaboration skills If we've just described you, we'd love to hear from you.