After Harvard, he was hired by Guinness Brewery as head of strategy for Guinness Americas and Caribbean.
The first division founded in what was to later become the Irish Free State was the Dublin (St James's Gate) Ambulance Division, formed in 1903 at the Guinness Brewery at St. James's Gate in Dublin, under the guidance of Dr. (later Sir) John Lumsden.
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In 1991, Tamayo sold 95% of Industrias Pampero to the United Distillers subsidiary of Guinness Brewery for £45 million.
The Centre was started alongside the Guinness family's British Properties developments nearby, and was named after the London suburb of Park Royal where a Guinness brewery stood.
In 2010 The Right Honourable Desmond Guinness, a direct descendant of Guinness Brewery founder Arthur Guinness, will serve as the parade's grand marshal.