Kristen Diaz is an experienced Purchasing Manager at Powertech Controls, where responsibilities include preparing and issuing purchase orders, negotiating vendor pricing contracts, supervising the purchasing and customer service team, resolving invoicing discrepancies, and ensuring compliance with ISO9001/AS9120 standards. Prior experience includes serving as a Crew Leader Assistant at the U.S. Census Bureau, where Russell organized housing information and supervised enumerators, and as a Customer Service Representative at Mr. Bar-B-Q and Savoy Medical Supply Co Inc, managing customer accounts and processing invoices. Kristen holds a degree in Business Administration from Suffolk County Community College.