Mr Griffiths graduated in medicine from Cardiff University in 1996 with several honours and awards. He has been a senior Consultant Gynaecologist in endometriosis and reproductive surgery at the University Hospital of Wales for over 15 years.

Mr Griffiths is an accredited BSGE endometriosis surgeon and set up the first BSGE tertiary referral endometriosis centre in Wales. He is the preceptor for training advanced minimal access surgery, assisted conception and medical education in Wales and has trained several highly successful consultants in endometriosis.

Also recognised as an international leader in minimal access surgery, reproductive medicine and endometriosis, Mr Griffiths has over 100 publications and published two textbooks. He has also won international and national prizes for endometriosis research.

Mr Griffiths' post graduate training in surgery included The Royal College of Obstetricians and Gynaecologist level II certificates (London) in laparoscopy, hysteroscopy and reproductive surgery. He also holds a PG diploma in minimal access surgery (Surrey) as well as a PG diploma in medical education (Cardiff). Mr Griffiths also trained in advanced endometriosis surgery in Atlanta, USA. He is also a teacher in evidenced based medicine, running courses in London, Jordan, China, Dubai, Indonesia and Ghana. Mr Griffiths ran the RCOG part I course for over 6 years and now chairs the RCOG part I committee. 

Mr Griffiths has secured a number of NHS management roles including: clinical director, chairing the National speciality advisory group in Welsh Government, chairing RCOG Welsh exec committee, RCOG Council, NHS workforce committee, Welsh government endometriosis task and finish group and Vice President of the BSGI.

Mr Griffiths academic work includes reviewer for several scientific journals, external examiner for Swansea and Cardiff University, RCOG grant assessor. He also lectures for the University of Amman, Cardiff University and is an external examiner for Swansea University.