Dunn & Ellis Cyf

Company Directors

The firm currently has two directors – Sion E Roberts and Iorwerth Ll Williams – and a very strong and experienced team of qualified staff.

Information on the Directors can be found below, while the background information and contact details for other members of staff can be found in the dedicated Staff Directory.

Sion E Roberts CTA, ATT


Having commenced employment with Dunn & Ellis Cyf in 1988, Sion qualified as a Chartered Tax practitioner in 1999, entering into the partnership in 2001, and became a director upon incorporation in June, 2016.

Sion specializes in the taxation of individuals and companies, having a particular interest in the taxation issues specific to the rural economy.

Sion gained a SWAT UK Certificate in Probate and Estate Administration Course and Assessment in November, 2015.

Iorwerth Williams B.Sc(Econ), FCA


Iorwerth commenced working for Dunn & Ellis Cyf in March of 2007 after completion of his Chartered Accountancy qualification with Deloitte in Cardiff and London.

Iorwerth graduated at the University of Wales Aberystwyth after studying Agriculture and Business Studies.

Iorwerth became a partner within the practice in February, 2010 and a director upon incorporation in June, 2016.