He co-wrote and performed in the play A Heathen Goddess at the West London Theatre in 1894.
[3] In the 1890s, he was a film exhibitor, known for the "Royal Cinematoscope", which was the name under which he exhibited Birt Acres' Kineopticon.
[7] Having left family in Ireland and England, he apparently returned to work as a stage actor in London, before travelling once more to New York around 1915 to begin a career in film.
His film career included appearances in a number of silent features, in The Witching Hour (1916).
A Variety review noted that Sealy "brought a dignity commensurate with the role".