His best-known choral work is “Dúlamán” (1995), a setting of the traditional Irish poem of the same name. This work has been performed and recorded extensively. It features another characteristic aspect of his musical language in its use of multiple alternating rhythms. Michael McGlynn’s music has been recorded and performed by such internationally recognised vocal ensembles as Rajaton, the National Youth Choir of Great Britain, The Dale Warland Singers, Conspirare, the BBC Singers, the Phoenix Chorale and Chanticleer. In 1987 he founded the Irish choral group Anúna. Anúna have released fourteen albums, almost exclusively featuring his arrangements and original works. Three of these, "Anúna", "Celtic Origins" and "Christmas Memories" have featured in the US Billboard Charts with the latter reaching number 95 in the Billborad main album charts in late 2011. “Deep Dead Blue” was nominated for a Classical Brit Award in 2000 and went top five in the UK Classical Charts.

Although best known as a writer of choral music, Michael McGlynn has written orchestral and instrumental work. “Behind the Closed Eye”, written for the Ulster Orchestra has been highly successful as a CD release, and in 2009 the RTÉ National Symphony Orchestra presented an entire evening of Michael's orchestral output at Dublin's National Concert Hall. "Visions" for saxophone and piano has also been successful.

Michael is much in demand as a vocal coach, specialising in work with choral groups. He has led workshops and coaching sessions for singers in Japan, Poland, Sweden and USA in 2011.  He was a guest-judge and vocal advisor on Finland's version of the X Factor in 2010. In July 2011 he stewarded the first Anúna International Summer School at Dublin's National Concert Hall. Michael will be an Eminent Scholar of Florida Atlantic University for the 2011/12 academic year and adjudicated at the International Early Music Vocal Competition Canticum Gaudium in Poznań, Poland in November 2011

He is a film-maker, with his debut self produced and directed film "Invocations of Ireland" being broadcast across Australia and New Zealand in 2010 on the Ovation Channel, and released on DVD in Australia [DV1] and Japan [Columbia]. He has produced all fifteen Anúna albums. He lives in Dublin with his family where his interests include sea swimming, horse riding and procrastination.