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Mark Sizer is a seasoned professional with extensive experience in the technology and services industry, currently serving as a Senior Practice Manager at Confluent since April 2023, focusing on services and education sales as well as team management to enhance customer success. Previous roles include Regional Manager Professional Services at Informatica and Services Sales Manager for UKI and Nordics at Veritas Technologies LLC, where responsibilities encompassed selling a broad range of professional services across various sectors. Mark Sizer is also the Owner/Director of Optimum Sales Management Ltd, providing consultancy for SMEs to meet sales and marketing goals. An accomplished sales expert, Mark has held significant positions at EMC, DCG Group, ICM Business Continuity, InTechnology, and hSo, demonstrating a proven track record in account management, new business development, and professional services sales. Mark holds a Combined Honours BSc in Business and Psychology from Aston University and has A Levels in Economics, History, Politics, and General Studies from King Edward VI Grammar School, Chelmsford, Essex.