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Jack Nelissen is an experienced professional in data warehousing and business intelligence, currently serving as a Data Warehouse Developer at PostFinance Ltd since July 2015. Prior roles include Data Migration Specialist and Qlikview Specialist at MSG systems ag, along with various positions at CSC Netherlands and CSC Switzerland as a Security Specialist and Data Migration Specialist. Jack's career began in 2000 as an Oracle Application Developer at CSC and spans over two decades, including work at Sys-Aid and Plumex. Jack holds multiple certifications, including CBIP Certified Business Intelligence Professional, with a focus on Data Modeling/Warehousing and Database Administration. Additionally, academic pursuits include studies at Fernfachhochschule Schweiz and various professional development courses.