Our team

Onllwyn Male Voice Choir consists of a team of competent, committed and experienced musicians and equally committed committee members. Allow us to introduce them to you on this page.

Musical Director & Accompanist

Julie Sims


Julie hails from Swansea and has been involved in the music scene since a young age. Julie was accompanist for Swansea Male Voice Choir, where she held the position for 10 years. She then become accompanist with Glynneath Male Voice Choir and later held the same position with Cor Meibion Onllwyn, where she has been a loyal member of the musical team for some 20 years.


Julie has played in many concert halls here in the UK and abroad, and has accompanied many guest artists. Latterly Julie has been involved in the musical team at the Wales International Academy of Voice, Cardiff. Julie is an experienced repetiteur and is the official accompanist of her son, Matthew Ioan Sims, Tenor. 


Contact Julie at:






Detupy Musical Director & Conductor.

Matthew Ioan Sims MA.


Matthew began singing at a young age and became a pupil of Welsh Soprano Patricia O'Neill in 1998. After two years of study he joined the Welsh National Youth Opera (WNYO) and performed in several of their productions. These roles include: Macheath (Beggar’s Opera), Pirelli (Sweeny Todd), Nanki-poo (Mikado), in Cardiff and at Belfast Opera House.


During his invaluable years with WNYO he was accepted as a student at The Royal Welsh College of Music and Drama, Cardiff. During his studies, at the college, Matthew became a member of the famous young Welsh choir Only Men Aloud.


In 2012 Matthew was invited to study with International Tenor Dennis O'Neill. This was at the Wales International Academy of Voice, Cardiff. It was during this time Matthew gratuated with a Masters Degree in Advanced Vocal Studies.


Matthew has performed at many concert venues and has participated in Masterclasses with Dame Kiri Te Kanawa, Dennis O’Neill, Rebecca Evans, Della Jones, Ryland Davies, Peter Wilson and Nelly Miricioiu.


Throughought Matthew's studies and personal successes, he has always had stong links to the Welsh Male Choir tradition. This was thanks to the involvement of his parents in the tradition also. He is delighted to be involved again in this tradition, especially as the conductor of a choir who supported him so much over many years of his career. It is great to be able to combine two loves, singing and choir, and to assist the choir to be the best that they can. 


Contact Matthew at:



Contact Us

Cor Meibion Onllwyn


Onllwyn Miners Welfare Hall

Wembley Avenue


SA10 9HL


Onllwyn Choir Rehersals

Sunday 6.00pm - 8.00pm

Tuesday 7.30pm - 9.00pm



Mr. Lynn Parfitt




Please contact the secretary with any initial enquiries


Should you wish to discuss any musical requirements

please contact our team

using these links below;

Musical Director



Next Engagements:


Korunni Chapel Prague

Friday 7th Sept 6pm.

St Nicholas' Church Prague

Saturday 8th Sept 2pm.


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Onllwyn Male Voice Choir