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John McCollum is a seasoned Senior Business Intelligence Developer at Nucleus Financial since August 2014, with a robust background in SQL development and application development. Previous roles include SQL Developer at Barclays Wealth and Investment Management and Callcredit Information Group, where John participated in Agile/DSDM environments, designed schema changes, and developed T-SQL stored procedures using test-driven development. Additional experience spans various positions at Barclays Wealth and Investment Management, Ignis, Martin Currie, and Alliance Trust, highlighting a comprehensive expertise in IT and development. John holds a Bachelor of Science (BSc) in Computer Science from the University of Glasgow, earned between 1981 and 1984.