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Marina Firsova is an experienced QA/QC Manager currently at RingCentral since March 2022, where responsibilities include risk assessment, test strategy definition, test design management, test execution oversight, and quality reporting through JIRA, Excel, and PowerPoint. Previously, Marina served as QA Lead at DINS from March 2019 to March 2023, initiating QA processes for a contact center project and developing test documentation. Prior roles include QA Lead/QA Manager and QA Engineer at VIAcode from September 2008 to March 2019, and QA Engineer at Stella Systems from March 2007 to June 2008, focusing on requirement elaboration and test case creation. Marina holds a Master's degree in Mathematics from V. N. Karazin Kharkiv National University, completed in June 2007.