Jonathan began his civil service career at HM Treasury. He worked there for nearly 14 years on a range of economic and policy issues. This included significant changes to the tax and benefit system, and key tax policy reforms. He also worked on the fiscal and macroeconomic policy framework, and oversaw spending on the NHS and social care in England.
In 2011 Jonathan joined HM Revenue and Customs as Director of the Knowledge, Analysis and Intelligence directorate and as Departmental Chief Economist. His directorate’s responsibilities included providing tax forecasts to the Office for Budget Responsibility and analysis to support the policy partnership between HM Revenue and Customs and HM Treasury. In addition, he oversaw the production of the Measuring the Tax Gap publication, managed the Department’s research programme and helped to embed a greater use of data and analytics techniques in HM Revenue and Customs