Manus began his career in the field of stained glass, working for the famous Abbey Stained Glass Studios in Dublin during the sixties. It was during his time there that he met George Campbell R.H.A., who became his mentor and friend and also encouraged him to take up painting full time. Among many of Manus' stained glass designs at that time, were five windows for Galway Cathedral, and more recently the Michael Greene Memorial window which can be seen in St. John's Church, Ballyvaughan.
Manus has been living and working in Ballyvaughan for thirty years. The Burren (he moved thirty-one years ago in New Quay), this unique corner of Ireland, has had a major influence on his life and work. Manus has also travelled widely, especially through Spain and Chile. His association with Spain goes back to the sixties, where he spent many formative months with George Campbell in Malaga. Manus has kept up this association to the present day, and for the past four winters has had the opportunity to live and work in various parts of Andalucia.

Solo Shows:
1967 Dublin Painters Gallery.
1968 R.H.A Gallery,Dublin
1969 R.H.A. Gallery,Dublin.
1973 Project Arts Centre,Dublin.
1974 Cork Arts Society Gallery.
1975 Caldwell Gallery,Dublin.
1978 Kenny Gallery,Galway.
1979 Cork Arts Society Gallery.
1983 Kenny Gallery, Galway.
1983 Brogan Gallery,Ennis.
1984 Brogan Gallery,Ennis.
1984 Kenny Gallery,Galway.
1984 Ennistimon Arts Festival.
1986 Kenny Gallery,Galway
1987 Listowel Writers Week.
1991 Kenny Gallery,Galway.
1991 Vina Del Mar & Santiago,Chile.
1992 Riverrun Gallery,Dublin.
1993 Sligo Art Gallery.
1997 Centro Cultural,Vina Del Mar,Chile.
1998 Kenny Gallery, Galway.
1998 Dyehouse Gallery,Waterford.
1999 Lavitt Gallery Cork.
2001 La Sebastiana Gallery,Valparaiso,Chile.
2001 Origin Gallery Dublin.
2002 Mrua Gallery,Bellharbour,Co.CLARE.
2003 Wexford Arts Centre.
2003 Kilcock Art Gallery.
2004 Moulin Gallery,Limerick.
2005 Rincon Del La Victoria,Malaga.
2005 Origin Gallery,Dublin.
2005 Glor Gallery,Ennis.
2006 Kilcock Gallery,Co. Kildare.
2006 The Russell Gallery, Co. Clare
2007 Kenny's Art Gallery, Galway

Numerous group shows around Ireland, and in Spain.

Collections:
The Arts Council, A.I.B., O.P.W..I.C.I.
Private collections in Chile, Spain, England, France, Germany, U.S.A, Italy