Aleksander Wierak
Burnham
Summary
A skilled data professional with expertise in database operations, data integration, and business intelligence. Proficient in tools such as Denodo, T-SQL, Snowflake, and Salesforce APIs, with a strong command of Power BI (DAX) and Salesforce Analytics for effective data visualisation. Demonstrates a robust ability to conduct root cause investigations and design KPI frameworks while ensuring data quality governance. Experienced in technical writing for non-technical users and adept at using JIRA within Agile methodologies. Committed to leveraging skills in UNIX and version control tools to drive organisational success.
Overview
6
6
years of professional experience
4
4
years of post-secondary education
Work history
Data & Reporting Manager
Ayvens (formerly LeasePlan)
Slough, England
03.2022 - Current
- Built Denodo/Snowflake ETL workflows integrating Salesforce, AWS call data & legacy systems, trimming reporting wait times and enabling self-serve
- Automated 15+ Power BI dashboards with daily refresh schedule, included automated email alerts for KPIs at risk
- Developed MS Forms + Power BI replacement for EvaluAgent (£96k projected annual savings)
- Assisted in designing a KPI framework adopted by C-suite
- Wrote 25+ SOPs, enabling 60+ non-tech users
End of Contract Specialist
LeasePlan
Slough, England
10.2019 - 03.2022
- Processed 120+ lease terminations monthly with 100% accuracy, preventing annual losses
- Created error-proof Excel templates later adapted for SQL automation
- Worked on transition from local network drives to M365 suite, translating change into layman language and mapping network locations to be transferred into SharePoint sites
- Fixed broken excel reports/automation after transition to SharePoint
Education
XIV LO im. Stanisława Staszica
Warsaw 09.2007 - 08.2011
Skills
- Database operations (partitioning, index/statistics maintenance, performance analysis)
- Data Integration: Denodo, T-SQL, Snowflake, Salesforce APIs, AWS Connect
- BI & Visualization: Power BI (DAX), Salesforce Analytics, Excel (Advanced)
- Root Cause Investigation
- KPI Framework Design
- Data Quality Governance
- Knowledge of Version Control tools
- UNIX
- Technical Writing (SOPs for Non-Tech Users)
- Experienced and proficient in working with JIRA and Agile methodology
Languages
English
Proficient (C2)
Polish
Native
Timeline
Data & Reporting Manager
Ayvens (formerly LeasePlan)
03.2022 - Current
End of Contract Specialist
LeasePlan
10.2019 - 03.2022
XIV LO im. Stanisława Staszica
09.2007 - 08.2011
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