By coincidence I saw that Eric Alexander, ex-controller of Golden Minerals, moved to Pershing. I don't know whether he left GM or Sunshine Silver during this move.

"In addition, further to Pershing's decision to bring its finance and accounting function inside the company, it designated Eric Alexander, Pershing's Vice President of Finance and Controller, principal financial officer and principal accounting officer. Mr. Alexander joined Pershing in September 2012. Previously, Mr. Alexander served as Controller at Sunshine Silver Mines Corporation and Golden Minerals Company. He is a certified public accountant with over 20 years of professional finance and accounting experience."

http://globenewswire.com/news-release/2012/11/26/507281/10013407/en/Pershing-Gold-Corporation-Names-Alex-Morrison-to-Board-of-Directors.html