BI & Data analytics @ - Document data flows and mappings between source and target systems - Establish and enforce data quality and governance procedures using established tools and methodologies - Work with end-users to analyse and deliver ad-hoc data and reporting requests. - Design, develop and present Qlikview Dashboards From October 2015 to Present (3 months) London, United KingdomBI & Data Analytics @ - Document data flows and mappings between source and target systems - Establish and enforce data quality and governance procedures using established tools and methodologies - Work with end-users to analyse and deliver ad-hoc data and reporting requests. - Design, develop and present Qlikview & Qliksense reports using large amounts of data - Qlikview Server management & licensing management From April 2015 to October 2015 (7 months) London, United KingdomData Assurance - London Top Tier (FTSE 100) @ Collecting, collating and carrying out complex data analysis in support of management & customer requests. Duties: - Data analytics to provide insight, understanding and analysis on financial and statistical data utilising Lavastorm, Qlikview, R. - Utilising ACL and SQL scripting to run substantive testing on journals data with a focus on risk mitigation within manual journals and the revenue stream (ISA 240/315 compliance). - Risk assurance with a focus on process and IT general controls (ISA 315 compliance). - Data migration assurance for both pre- and post-implementation projects. - Data Governance. Designing Data Processes/Workflows. - Use of ETL tools to extract, transform & load source data from transaction systems. - Customer segmentation and analytics. - Continuous customisation & development of Qlikview applications. Development of reports & Dashboards. Create & Implement training for users. - Designed and co-authored the global PwC Data Visualisation training course. - Designed and co-authored the global PwC Qlikview developer training course. From September 2013 to April 2015 (1 year 8 months) London, United KingdomExcel / VBA Data Analyst @ - Data entry, data auditing, creating data reports & monitoring all data for accuracy. - Complex data analysis and manipulation using Access or - Excel (Pivot Tables, Formulas, vlookups, macro programming etc) - Developing custom client solution in VBA. - Responsible for documenting and training people in the use of the tools developed in VBA From May 2010 to August 2013 (3 years 4 months) Teaching Fellow / Research Analyst @ Provide teaching support including the supervision and organisation of practical classes. Duties: - Demonstrating methods; assisting staff and undergraduate students in the use of equipment and associated computing/digital technology. - Performing experimental work, implementing field research or handling existing data. - Designing models, fitting them to data and reporting the insights and implications. - Handling and analysing large time-series data sets in Matlab and R. From December 2008 to April 2010 (1 year 5 months) Electronic Engineer - Internship @ - Maintaining and operating standard laboratory equipment. - Installation of new equipment or modifications to existing equipment. - Demonstrating practical procedures and lab equipment to undergraduate students. - Performing lab tests for research projects. From November 2007 to April 2008 (6 months)

Master of Science (MSc), Engineering Management @ University of York From 2011 to 2012 Bachelor of Science (BSc), Electronic Engineering, 2:1 with Honours (65%) @ TEI of Thessaloniki V O. is skilled in: QlikView Development, Data Visualization, Microsoft Office, Project Management, Strategic Planning, Business Analysis, Team Leadership, Data Analysis, Team Management, Change Management, VBA, C++, Lavastorm, SQL, SAP