
Radomil Siegel
Verified Expert in Engineering
Business Intelligence (BI) Developer
Olomouc, Olomouc Region, Czech Republic
Toptal member since November 22, 2023
Radomil is a business intelligence (BI) solution expert with 17 years of BI experience. He specializes in Teradata- and Oracle-based data warehouse solutions and IBM Cognos and Power BI reporting. He performs business analysis, with direct contact with business users, and handles Cognos administration and report or dashboard development. Radomil has also delivered projects in data analysis, semantic layer development, metadata management, and data security management at row and column levels.
Portfolio
Experience
- SQL - 20 years
- Business Analysis - 10 years
- Oracle - 8 years
- Cognos 10 - 8 years
- Teradata - 5 years
- DAX - 4 years
- Microsoft Power BI - 4 years
- Windows 11 - 1 year
Availability
Preferred Environment
Windows 11, Cognos 10, Microsoft Edge, Microsoft Power BI, Oracle Instant Client
The most amazing...
...project I've delivered is a data security implementation in IBM Cognos, ensuring the report output is filtered according to the user's security group.
Work Experience
BI Solution Expert
Oriflame Software S.R.O.
- Analyzed business requirements, defined database steps when data was unavailable, prepared data models for reporting, and developed required reports in Cognos or Power BI.
- Specified data quality rules and fixed issues as a level 3 support as needed.
- Supported Cognos administration, handling issues such as failed schedulers or removed TMP files.
Experience
Product Quality Reports
As a front-end developer, I worked with the business to produce the reports. We prepared KPIs for measuring quality and defined the perspective for monitoring data, such as the percent of claimed or ordered quantity involving claims due to quality reasons.
Power BI Pilot
• Row level: Filtering data in the proper report depending on the logged user.
• Column level: Deciding what columns can be visible or invisible in the same report depending on the logged user.
Education
Master's Degree in Mathematics and Computer Science
Palacky University Olomouc - Olomouc, Czech Republic
Certifications
IBM Cognos 8 BI Administrator
BIterra
IBM Cognos 8 BI Author
BIterra
Teradata Certified Professional V2R5
Teradata
Skills
Tools
IBM Cognos, Microsoft Excel, Microsoft Power BI, Teradata Studio
Languages
SQL
Platforms
Oracle, Microsoft Edge
Storage
Teradata
Other
Cognos 10, Dashboards, Data Visualization, Oracle Instant Client, Business Analysis, DAX, Computer Science, Windows 11
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