Royal goldsmith Brandon became a freeman of the
Worshipful Company of Goldsmiths, one of the
Livery Companies or craft guilds of the City of London, by redemption (paying an entrance fee) on 3 February 1548. He advanced to
liveryman of the Goldsmiths' Company on 5 May 1561 and served as its Prime Warden 1582–83, chairing the Court of Wardens or governing body of the company. Brandon was one of the queen's two royal goldsmiths from c. 1558 to 1580. Royal goldsmiths of this era "were often selected more for their financial skills than their craftsmanship", often acting as agents for other members of the company. As royal goldsmith, Brandon made or supplied gold chains and the gold and silver-gilt cups, bowls, and other forms of plate that were given as
New Year's Day gifts by the queen to members of her court and as gifts to foreign princes and their servants. The queen's gifts were recorded in inventories, known as "Gift Rolls", with such entries as, "Item, more given by her saide Majestie, and delivered the secunde of Marche, anno 20° praed' [year foresaid], to Doctor Bewtricke, sent from Duke Cashemere (
Johann Casimir of Simmern), a chaine of golde, bought of Robert Brandon and
Hugh Keall, our goldesmithes".
Chamberlain On 8 January 1583, Brandon was elected chamberlain or treasurer of the City of London and served in that capacity until his death in 1591. There were many worries about the finances of the chamberlain's office during the later years of Brandon's tenure, especially concerning the management of City lands. Although he was never formally charged or censured, in his will, drawn up three weeks before his death in 1591, Brandon was moved to defend himself: ==Marriages and progeny==