I am a computational physicist with 16 years of international experience in numerical relativity, parallel high performance computing, numerical algorithms and software development. I am interested in solving problems and building things.
- Parallel numerical solution of partial differential equations/CFD on supercomputers, focused on binary black hole simulations for gravitational wave science in LIGO
- Scientific software and algorithm/numerical methods development. Numerical methods for adaptive mesh refinement.
- Mathematical modelling of numerical solutions and interfacing of multiple methods
- C/C++, Mathematica, Python, MPI, OpenMP
- Used dozens of supercomputers (XSEDE, PRACE, institute machines) with various schedulers and libraries etc
- Interest in functional languages (Ocaml) and Rust
- Maintainer of the Einstein Toolkit (one of five), the open source numerical relativity community software used by 117 groups worldwide. Framework computing with Cactus.
- Automated code generation for HPC (author of Kranc, at the core of the Einstein Toolkit).
- Continuous integration, code review, expert in Git
- High performance computing, profiling and low and high level optimisation (CPU, CUDA, Intel Xeon-Phi)
- Realtime simulation monitoring, data validation and archival
- Instigator and lead on research projects
- Published 35 research papers in the field of binary black hole / gravitational wave science, cited about 2000 times
- Presented dozens of research talks at international conferences, of which 7 were invited or plenary, and chaired conference sessions
- Refereeing (peer review) for several journals
- Lectured students on computational methods and numerical relativity and supervised students on computational projects
- Co-principal investigator on US XSEDE computer time allocations
- Scientific organising committee for international schools/workshops
Experience and education
- 2018-present: Research Software Engineer (permanent), University of Manchester, UK
- Work on various research projects around the university
- Software development for radiotherapy treatment planning
- Neuroscience tractography and streamline tracking
- High performance computing and optimisation
- Lattice-Boltzmann methods for hydrodynamics in mechanical engineering
- Continuous integration and version control in research groups
- Fostering computational research best-practices
- 2008–2018: Postdoctoral researcher, Max Planck Institute for Gravitational Physics, Germany
- Simulations and science of binary black holes and gravitational waves
- Member of the LIGO Scientific Collaboration
- Designed, implemented and tested the first complete gravitational waveform model for eccentric binaries constructed using numerical simulations
- Implementation of improved adaptive mesh refinement method in Einstein Toolkit
- Development of end-to-end automated infrastructure for producing accurate gravitational waveforms using HPC
- Led the numerical part of the international 13-institution Numerical Relativity/Analytical Relativity collaboration
- Led the team which showed the correct asymptotic falloff rate of the Weyl scalars in numerical simulations, correcting previous results
- Developed and ran the first binary black hole simulations on GPUs
- Lead author of SimulationTools for Mathematica, a software package for analysis of computational data in Numerical Relativity
- Led purchase of two large HPC clusters. PhD student selection committee.
- 2005–2008: Postdoctoral researcher, Penn State University, USA
- Binary black hole science and simulation
- Used the software developed during my PhD to make the PSU group competitive in the binary black hole field
- Showed that eccentric binary black holes (BBH) circularise at merger.
- First comparison between analytical and numerical eccentric BBH waveforms.
- 2002–2005: PhD, School of Mathematics (Applied), University of Southampton, UK
- Mathematical properties of the Einstein equations and formal stability proof of numerical discretisations. Automatic HPC C++ code generation from a high level symbolic description. Teaching assistant.
- 2001–2002: Software engineer, UGS Solutions, Cambridge, UK
- Computer Aided Design software development and automated testing. C/C++/Perl.
- 1997–2001: MSci (Hons) First Class in Physics, University of Cambridge, UK
- Theoretical physics, computer science, mathematics, chemistry
- 1998,1999: Summer vacation student at Raytheon Systems Ltd, Harlow, Essex, UK
- VHDL embedded electronics, aircraft transponder test software