Buy or borrow Luibhéid’s translation. For a free, public-domain alternative , search “Pseudo-Dionysius Parker translation Internet Archive” – but the Luibhéid is vastly superior for study.
Here’s a useful review of Pseudo-Dionysius: The Complete Works (translated by Colm Luibhéid, Paulist Press, 1987), which is the standard English edition: pseudo-dionysius the complete works pdf
Those wanting a free PDF – legally , this edition is under copyright (1987), so you won’t find a legitimate free PDF. However, older public-domain translations (e.g., John Parker’s 1897 edition) are available on Archive.org, but Parker’s English is archaic and less reliable. Buy or borrow Luibhéid’s translation