2009-11-21T06:01:30.+01:00Air Productstag:jobs.airproducts.com,2009 Air Products and Chemicals, Inc., a Fortune 500 manufacturer of industrial gases and chemicals, has an immediate opening for a Principal Systems Engineer at our Corporate Headquarters in Allentown, Pennsylvania. The Principal Systems Engineer is a member of a highly specialized staff of professionals who provide mathematical and statistical consulting and analysis services primarily to scientifi2009-11-20T11:30:29.+01:001307433023