Mark is a British-born Chinese Anglican priest serving in the Diocese of Oxford in the Church of England. He is a trustee with SPCK (Society for Promoting Christian Knowledge) and a core member of CARG (Campaign Against Racism Group) which works on policy and strategy with the UK Government and local authorities.

Before training for ordination, Mark was a pastor at the Vine Church in Hong Kong for nine years, before which he trained as a solicitor. Mark occasionally teaches at theological colleges and is a regular contributor to the BBC, UCB and Premier Radio, and has written for the Church Times, Preach Magazine, and Premier Christianity. He was granted the Lambeth Award in 2023 for his services to the Church and community and, in particular, for his work among the Chinese diaspora in the UK.