Mary Crehan's work incorporates hand-made paper, cloth, screen- and block-printing, as well as hand and machine embroidery. This creates a highly textured and painterly surface.

Architecture and stone carvings found on Neolithic sites, as well as the Irish landscape, particularly the Burren, County Clare, are some of her sources of inspiration

Mary Crehan is a member of the Embroiderers Guild, Suffolk East Branch. She is a founder member of TAGS (Textile Art Group, Suffolk) and YEG (Young Embroiderers Group) for Suffolk East, a member of the Surface Design Association.