Lord Justice Dingemans was called to the Bar in 1987 and made a Queen’s Counsel in 2002. Prominent moments in his legal career included appearing in constitutional cases from around the Commonwealth, including acting in pro bono death row cases in the Privy Council for persons appealing against their sentence of death, such as Bernard v The State  UKPC;  2 Cr App R. 22, and against the constitutionality of the mandatory sentence of death, such as Miguel v Trinidad and Tobago  UKPC 14;  1 AC 361. He was leading counsel to the Hutton Inquiry in 2003 and acted for the Express and Star newspapers in the Leveson Inquiry in 2011-2012.
He was appointed a High Court Judge in 2013 and sat in the Queen’s Bench Division (now King’s Bench Division). He was a Presiding Judge of the Western Circuit from 2014 to 2018. He was appointed to the Court of Appeal in 2019 and has been the Vice-President of the Queen’s Bench Division (now King’s Bench Division) since February 2020. He was appointed as lead judge for International Relations, which took effect from February 2021.
Lord Justice Dingemans played Rugby Union for a number of years and was a judicial officer at the Rugby World Cups in 2015 and 2019.