Our People

Our group is made up of a multi-disciplinary team of professional scientists, engineers and software developers, each with their own areas of specialism:

Steven Joyce - Dr Steven Joyce is the Operations Manager of the Radwaste Disposal unit at Jacobs. His main focus is managing teams of geological and hydrogeological modellers involved with the geological disposal of radioactive waste. His work includes developing geological understanding from site investigation and characterisation data and using it to make predictions of groundwater flow and contaminant transport. Steven has over 20 years of experience of hydrogeological modelling and software development, with extensive project management and people management experience in a consultancy environment.

Nick Jefferies - Nick Jefferies is a highly experienced geologist with more than thirty years' experience of providing geological, hydrogeological and wider environmental consultancy. His principal areas of expertise are site characterisation, decommissioning and remediation of nuclear sites.

Andrew Hoch - Dr Andrew Hoch is a theoretical physicist with over three decades' experience of working on a range of issues surrounding the disposal of radioactive waste (corrosion of waste containers, groundwater flow and transport, geochemical evolution of the near field, and gas generation and migration), for clients both in the UK and overseas. Andrew has a unique background in the modelling of both physical and chemical processes in geological disposal facilities.

Ben Swift - Ben Swift has over 20 years' experience of working on nuclear waste packaging and disposal issues, for organisations both in the UK and overseas. Much of his work has concerned waste package issues during all stages of the life-cycle, including storage, transport and following disposal in a facility. Ben is an expert in both developing and applying models for a wide range of processes important to the behaviour of waste packages, and in particular in modelling gas generation from radioactive waste materials.

David Applegate - Dr David Applegate is a computational physicist specialising in radionuclide transport and groundwater modelling, with over 13 years of experience. He is also an expert in GoldSim modelling. David is the lead developer of Jacobs' groundwater and transport modelling software package, ConnectFlow, and has implemented a range of important developments. He uses a diverse set of tools for software development, including Fortran, Java, Perl, Python and the MPI library for parallel programming.

Hannah Woollard - Dr Hannah Woollard is the team leader of the near surface and coupled modelling team at Jacobs. She has worked on a variety of modelling projects both nationally, for LLW Repository Ltd., Sellafield Ltd., the NDA and NuGen, and internationally, for SKB and Posiva. She currently concentrates on leading the work on hydrogeological modelling of Quaternary deposits in Cumbria, using continuous porous medium (CPM) models in ConnectFlow.

Pete Appleyard - Pete Appleyard is the software manager for ConnectFlow. He has a background in Physics and works primarily on development of ConnectFlow and modelling projects. He has developed, tested and verified numerous product releases and new software developments, and has done extensive modelling using ConnectFlow for customers in the UK, Sweden and Finland, in addition to responding to support queries from ConnectFlow users.

Simon Myers - Dr Simon Myers is a mathematical modeller who works on a variety of projects for customers in the nuclear industry. Simon has developed and updated software toolkits, including SMOGG (gas generation calculation), TDT (Thermal Dimensioning Tool), and supports Jacobs' groundwater modelling team, including the implementation of new functionality in ConnectFlow.

Tom Williams - Dr Tom Williams is a computational physicist with a PhD from the University of York. His role is centred on ConnectFlow modelling, with a focus on the DFN concept; amongst others, he has been extensively involved in modelling activities in support of the geological disposal programmes in Finland and Sweden. In the process, he has developed skills in database design and analysis for the conceptualisation and parameterisation of DFN models based on large integrated datasets. He is also involved in ConnectFlow development.

Javier Rodriguez Corral - Dr Javier Rodriguez Corral joined Jacobs in 2019 as a geological modelling consultant. In addition to providing support on ConnectFlow modelling projects, he has significant experience with several modelling packages for geotechnical design such as PLAXIS, LUSAS and Settle3D.

Guanqun Gai - Dr Guanqun Gai holds a PhD from the University of Liverpool in aerospace engineering and joined Jacobs in 2019. Guanqun's research involved the development of computational models of aircraft aeroelasticity and structural dynamics. This relied heavily on Python/MATLAB programming and resulted in several publications. He has worked on several software development tasks and has provided support to hydrogeological modelling projects.

JieJie Wu - Dr Jiejie Wu joined the team as a Mathematical Modelling Consultant after completing her PhD at the University of Manchester. Jiejie has been providing mathematical models for thermal (T), hydraulic (H) and mechanical (M) processes in the geological disposal facilities, underground water safety assessments, and other geological disposal projects. She is an expert in the use of finite element modelling tool, COMSOL Multiphysics, which can be used to solve a wide range of physics problems.

Chris Coleman - Dr Chris Coleman is a Chartered Geologist specialising in the development of 3D digital geological models used for engineering decision making and hydrogeological studies. He has an expertise in Quaternary geology and geomorphology. Chris has extensive experience of site characterisation delivery, including geophysical techniques, as well as the integration and management of site characterisation data and communication of variability and uncertainty in ground conditions to clients.

Amber Pavey - Amber Pavey is a geologist, joining Jacobs in 2021 following previous work developing 3D geological models, including for Sellafield Ltd. She has a strong geological background, including a masters project focused on interpreting 3D seismic data.

Simon Watson - Simon Watson is a Mathematical Modelling Consultant who joined Jacobs in 2021, after receiving his First-Class integrated Masters in Mathematics from the University of Bath. Throughout his degree, Simon developed modelling expertise in a variety of fields including Climate Modelling, the subject of his Masters thesis, which involved building and solving complex heat flux models. Simon now provides expertise in using ConnectFlow in groundwater flow modelling, as well as using other modelling tools such as GoldSim and COMSOL.

Russell Niven - Dr Russell Niven is a Mathematical Modeller for Jacobs after completing his PhD at University of Strathclyde. There he gained vital experience in mathematical modelling using finite element modelling and coding in FORTRAN. He currently models groundwater flow and reactive transport using ConnectFlow and PFLOTRAN. He is also part of the team working on ConnectFlow development and Goldsim assessment modelling.

Adam paxton -Dr Adam Paxton is a mathematical modeller who joined Jacobs in 2021, following previous research work in numerical climate modelling. He has a DPhil in pure mathematics from the University of Oxford, where he specialised in geometric analysis and partial differential equations. He has a wide range of interests spanning mathematics, physics, and the environment.