Greber composed solo cantatas, sonatas, and stage works, including the opera Gli amori di Ergasto which opened London's Queen's Theatre in 1705.
[3][4] The London newspaper The Post Man noted their appearance together at the spa town of Tunbridge Wells in August 1703: They write from Tunbridge Wells that there is arrived there that famous Italian Lady, Signiora Francesca Margaretta de L'Epine that gives every week entertainments of musick, all compos'd by that great Master Signior Jacomo Greber, perform'd to the content and great satisfaction of all the nobility and gentry.
[7] The printed libretto also contained an English translation by Peter Anthony Motteux, and on the opening night the performance included a prologue by Samuel Garth and an epilogue by William Congreve, both read by Anne Bracegirdle.
[3] A baptismal certificate in Düsseldorf, dated 23 June 1705 describes Greber as a Kapellmeister (music director) in the service of Charles Philip,[1] who at the time was the governor of Tyrol with a court in Innsbruck.
[1][9] Greber remained in the service of Charles Philip for the rest of his career, working closely on operas and other court entertainments with Augustin Stricker, Johann Hugo von Wilderer, and Gottfried Finger (whom he had known from his London days).
In 1723, after Charles Philip moved his court to Mannheim, Johann von Wilderer was appointed to serve jointly with Greber as Kapellmeister.