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Sigma-Aldrich (Nasdaq: SIAL) Announces Executive Management Changes: Retirement of David Julien and Promotion of Joseph Porwoll
Date:5/14/2010

ST. LOUIS, May 14 /PRNewswire-FirstCall/ -- Sigma-Aldrich announces the retirement of David Julien, President – Global Supply Chain effective on June 30, 2010.  Mr. Julien took on his current role in January 2009.  He served as President of the Research Specialties unit of the Company from July 2005 to January 2009 and before that in a number of senior roles including that of President of the Research Biotech unit of the Company.

(Logo:  http://www.newscom.com/cgi-bin/prnh/20050215/CGSIGMAALLOGO)

The Company is pleased to announce that Joseph Porwoll has been promoted to Vice President, Global Supply Chain and will take over the responsibilities held by Mr. Julien.  Mr. Porwoll holds a PhD in chemistry from the University of Minnesota and has been with the Company for 26 years in roles of increasing responsibility, most recently as Vice President of the Company's Wisconsin-based operations.

President and CEO Jai Nagarkatti commented, "We thank Dave Julien for his tremendous leadership and contributions over the years.  He played an integral role in making our Company a global player in the life sciences industry.  While we are sad to see Dave leave us and wish him well in his retirement, we are pleased to add Joe Porwoll to our executive te
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SOURCE Sigma-Aldrich
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