Wai qualified from Queen's University Belfast and received postgraduate training in Obstetrics and Gynaecology in Birmingham and London. After these he did a Urogynaecological Fellowship in Sydney, Australia. Wai's interest is in research resulting in 42 peer-reviewed publications.
He specialises in keyhole surgery, urinary incontinence, acupuncture for bladder irritability (performed only after initial consultation), prolapse and pelvic floor surgery.