Any hopes Jake Siewert may have had about a quiet start to his new job as head of the Goldman Sachs PR machine were well and truly scuppered this morning.

Goldman Sachs named Siewert as its new global head of corporate communications on Tuesday in an internal memo. Less than 24 hours later and a letter appeared in The New York Times written by disillusioned former Goldman Sachs employee Greg Smith, who had decided to share his reasons for leaving the bank with the world.