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.

Dr David Applegate is the technical lead and lead developer of Amentum’s groundwater modelling software, ConnectFlow. A computational physicist with over 20 years of experience, he specialises in contaminant transport and groundwater modelling. He has led key developments in ConnectFlow, including a novel DFN-based transport approach for fractured rock, code parallelisation, and mass-conserving particle tracking algorithms.  Alongside software development, he has extensive experience in groundwater safety assessments, contributing to multiple ESCs for the UK LLWR and supporting international disposal programmes in Sweden, Finland, and Canada.

Dr Hannah Woollard is the team leader of the Disposal Concepts and Models team at Amentum. She has worked on a variety of modelling projects both nationally, for the LLWR, Sellafield Ltd., the NDA and NuGen, and internationally, for SKB and Posiva. She specialises in leading the work on hydrogeological modelling of Quaternary deposits in Cumbria, using continuous porous medium (CPM) models in ConnectFlow.

Dr Surani Gunasekera is a Scientific Computing Consultant and key member of the ConnectFlow development team. As well as developing new functionality for ConnectFlow she ensures the quality of the software for each release. Surani has worked with various scientific models, software and programming languages, from utilising density functional theory software in the study of 2D materials to hydrogeological modelling.

Dr Peter Jackson is an acknowledged expert on the modelling of groundwater flow and solute transport, and on performance assessments for underground repositories for radioactive waste, with over 40 years experience. He has undertaken many studies for customers including Nirex, SKB in Sweden, and ANDRA in France. He had overall technical responsibility for modelling carried out for the Nirex 97 assessment for a potential repository at Sellafield. He was a hydrogeological consultant for the Low-Level Waste Repository (LLWR) in support of their 2011 and 2026 Environmental Safety Case. Peter is also an expert mathematical modeller.

Dr Adam Paxton is a mathematician and Lead Modelling Consultant at Amentum, specialising in hydrogeological modelling, uncertainty quantification, and scientific computing. He uses ConnectFlow to model groundwater flow and contaminant transport in support of geological disposal and environmental safety assessments, including calibration, sensitivity analysis, and Bayesian methods for complex subsurface systems. His wider work is grounded in applied mathematics, numerical methods, and porous-media flow, including multiphase systems and flow through heterogeneous aquifers.

Dr Joseph Elmes is a Chartered Mathematician at Amentum, specialising in computational modelling of coupled thermal–hydraulic–gas processes in subsurface environments. He holds a PhD in Applied Mathematics from the University of Leeds and has expertise in conservative discretisation methods, including finite volume and discontinuous Galerkin techniques, for geophysical and multi‑phase flow simulation in GDF assessments. An experienced Python developer and technical lead, he guides modelling strategy, numerical implementation, and quality assurance to deliver robust, efficient solutions.

Simon is a Mathematical Modeller at Amentum, having joined in 2021 after completing his master's degree in Mathematics. His work covers a wide range of projects, with a particular focus on modelling heat transfer, gas generation, and contaminant transport. His key expertise includes finite-element modelling using COMSOL Multiphysics and Monte Carlo simulation using GoldSim. Simon has also supported software development for various in-house toolkits.

Alfie Baker is a Graduate Mathematical Modeller at Amentum. Since joining, he has developed skills in numerical modelling and data analysis, contributing to projects that support nuclear waste management design and decision-making. Alongside his technical work, he leads sales support for ConnectFlow, helping ensure customers are well-supported and up to date with licencing. Alfie holds a mathematics degree from Durham University, with a strong foundation in modelling, PDEs, and numerical analysis.

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.

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 has almost 30 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 and gas migration from disposal facilities.

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 Amentum' groundwater modelling team, including the implementation of new functionality in ConnectFlow.

Dr Javier Rodriguez Corral is a Safety and Performance Assessment Consultant with experience in the development and application of numerical models to support decision-making in complex subsurface environments. He has contributed to multiple ConnectFlow projects, applying groundwater flow and transport modelling to inform safety cases. Javier also has experience in geomechanical modelling using FLAC3D, supporting the assessment of rock mass behaviour. His work includes integrating multidisciplinary data and communicating uncertainty in long-term system performance to clients.

Dr Jiejie Wu is a Senior Consultant in mathematical modelling, with extensive experience in coupled Thermal-Hydro-Mechanical (THM) modelling, post-closure safety assessment, computational fluid dynamics and electrochemistry modelling. She has led and contributed to numerous projects in surface, near surface and geological disposal, collaborating internationally with waste management experts to evaluate disposal concepts and designs across varied geological environment. Jiejie is highly skilled in the finite element platform COMSOL Multiphysics, applying it to diverse physics problems.