Marco Skulschus
Business Analyst, Data Warehouse Developer
Experience
Business Analyst, Data Warehouse Developer
NRW.Bank
Business analysis for risk controlling.
Development of a data warehouse based on MS SQL Server using data from the FIS Cross-Asset Trading and Risk Platform (formerly Front Arena).
Implementation of ETL and transformation logic using T-SQL and Python (Jinja2 template engine).
Modeling and automation of data structures with Data Vault.
Building reporting and analytical reports with Microsoft Power BI, including training and onboarding users.
MS Power BI Developer, Data Warehouse Developer
Liebherr-Aerospace Lindenberg GmbH
Migration of existing QlikSense reports to Microsoft Power BI.
Development of new reports in Power BI following reporting guidelines.
Further development of a data warehouse based on MS SQL Server with SSIS, SSAS and T-SQL.
Visualization and analysis of production and machine data as well as data from the ERP system.
Use of Analysis Services Tabular Model (SSAS), DAX and MS Power BI for self-service BI.
MS Power BI Developer, Oracle Developer
HDI / Talanx AG
Migration of IBM Cognos Report Studio reports to Microsoft Power BI with Oracle DB as data source.
Development of analyses and data queries using Oracle SQL and PL/SQL.
Analysis and preparation of data from various business processes for reporting and management decisions.
Part-time engagement (approx. 25–50%).
Self-employment
Comelio Swiss GmbH
Self-employment focusing on BI/DWH development, data analysis, business analysis and data engineering.
Execution of client projects in Switzerland, Germany and internationally, focusing on MS SQL Server, Oracle, Snowflake, Azure, Power BI as well as statistical analyses with R and Python.
MS Power BI Developer, Data Warehouse Developer
SoftwareOne AG
Replacement of existing MS SQL Server Analysis Services OLAP cubes and multidimensional SSRS solutions with an Azure-based solution using SSAS Tabular Model and Microsoft Power BI.
Development and optimization of SQL Server databases as well as data integration with Azure Data Factory and Power Query / M.
Analysis and visualization of data from Microsoft Dynamics CRM in Power BI.
Automation of processes and workflows with Microsoft Power Automate.
Support in the migration from SSAS and MS SQL Server to Databricks.
Close, continuous collaboration with distributed teams in India.
Initially full-time, later part-time engagement (approx. 50%).
XML Consultant
Cornelsen Verlag GmbH
Consulting and development as part of a digitalization project for textbooks.
Setting up an XML single source publishing workflow with DITA, oXygen, XSLT, and Schematron.
Providing technical consulting, quality assurance, and modeling with BPMN and UML.
Part-time role (approx. 25%).
Data Warehouse Developer
E.ON Energie GmbH
Further development and modeling of a data warehouse solution based on Snowflake and SnowSQL.
Data integration for contract, customer, and market data using Python and XSLT.
Setting up and maintaining reporting and analytics processes with Microsoft Power BI.
Initially full-time, then part-time (approx. 50%).
Web Developer
Comelio GmbH
Developing PHP-based websites connected to a PostgreSQL database.
Implementing XML integration and XSLT transformations for content and interfaces.
Using Bootstrap for responsive frontend design.
Part of a project based in Berlin.
Data Integration Specialist, Team Lead
Siemens Gas and Power GmbH & Co. KG
Consulting and development for a document management and XML single source publishing approach.
XML data integration and transformation using Altova MapForce, XSLT, and Python between different applications in the power plant planning and construction environment.
Technical responsibility for interface design and data flows.
Part-time role (about 25%).
Data Warehousing Specialist
Bundesrechenzentrum GmbH und Arbeitsmarktservice
Modeling and development of a data warehouse for labor market data based on Oracle and MS SQL Server.
Using Data Vault modeling to map complex historical data structures.
Automating loading processes and metadata management with WhereScape Red and WhereScape 3D.
Implementing T-SQL, PL/SQL, and MDX queries as well as OLAP cubes with SQL Server Analysis Services (SSAS).
Business Intelligence Specialist
PlanetHome AG
Modeling, designing, and developing a self-service BI platform based on MS SQL Server 2017, Azure Data Lake, Azure Data Factory, and Microsoft Power BI.
Developing an Analysis Services Tabular Model (SSAS) and DAX models for reporting and self-service analysis.
Using R and Shiny for visualizing and forecasting marketing and market data in real estate.
Replacing existing T-SQL and MDX calculations in SSAS with DAX-based models.
Performing analyses for marketing, sales, and market data in a hybrid Azure and on-premises setup.
Part-time role.
Data Integration Specialist
Loyalty Partner GmbH (Payback)
Developing and programming configurable data integration solutions with MS SQL Server Integration Services (SSIS) and T-SQL.
Building ETL processes for Microsoft Dynamics NAV (Navision) based on MS SQL Server 2014.
Implementing data integration for billing with Payback partner companies and the enterprise data warehouse.
Part-time role (approx. 50%).
Data Warehousing Specialist
HSH Nordbank AG
Data Vault modeling and building a central data platform for customer, business, risk, and payment data based on Oracle.
Creating interfaces with Talend plus additional Java and PL/SQL Apex programming for various banking systems.
Developing an enterprise data warehouse with SQL, PL/SQL, Java, and Xtext for automatic generation of Data Vault structures.
Analyzing and optimizing data throughput and query performance.
Performing ETL development and data integration to provide statutory and regulatory reports.
Business Intelligence Specialist, Data Warehousing Specialist
Toolport GmbH
Modeling and building a data warehouse for e-commerce and marketing analysis.
Designing, advising, and implementing with MS SQL Server including Data Vault modeling.
Developing OLAP cubes with SQL Server Analysis Services (SSAS) and reports with Reporting Services (SSRS) and Microsoft Power BI.
Implementing ETL processes and ensuring data quality with Integration Services (SSIS).
Using R and Shiny for forecasting and segmentation (time series analysis, regression, cluster analysis).
Project management with SCRUM and Jira.
Data Science Specialist
Atradius Credit Insurance N.V.
Building an analysis system for globally collected market and financial statement data for credit insurance.
Integrating data and defining interfaces between various source systems and advising on data quality.
Using MS SQL Server (T-SQL, SSIS, SSAS) and Oracle (PL/SQL) for OLAP and data mining.
Developing statistical models to calculate default probabilities with Naive Bayes, Bayesian networks, artificial neural networks, and logistic regression.
Programming and visualizing the models with R and Shiny.
Using XSLT, XML Schema, Altova MapForce, and Integration Services for data integration, data quality checks, and transformation.
Team Lead, Reporting Specialist
Österreichische Beamtenversicherung (ÖBV)
Automated generation of more than 500 PDF documents and reports from a data warehouse with customer and service data.
Creation of XML interfaces and reporting solutions using Oracle DB, PL/SQL, XSLT, XML Schema, and Altova StyleVision.
Use of Oracle APEX for reporting and interface development.
Project leadership including technology consulting, data modeling, and coaching.
Project management following SCRUM with Jira; responsibility as (sub)project manager.
Team Lead, Business Intelligence Specialist
EFG Bank AG
Design and development of a multilingual intranet reporting system for structured financial products.
Execution of multidimensional time series analyses and forecasts of market data and customer demand.
Technical project leadership for software development and statistical modeling.
Use of Oracle DB, PL/SQL, Oracle OLAP and Oracle Data Mining as well as R and Java.
Taking on a subproject lead role in the BI/Analytics environment.
Data Science Specialist, Team Lead
Bundesministerium für Wirtschaft und Innovation / Hochschule für Philosophie München / Comelio GmbH
Design and development of an ontology-based survey system for multidimensional and interactive questionnaires.
Integration of standard analyses (descriptive statistics, tests, correlations) and multivariate methods (regression, multidimensional scaling, clustering).
Cross-company overall project management with responsibility for architecture, development, and data analysis.
Use of MS SQL Server, .NET, OWL, XSLT and XSL-FO as well as Oracle, PL/SQL, Java, R, and data mining.
Definition of XML Schema and Schematron rules to validate questionnaire and response data.
Reporting Specialist, Team Lead
Logit Management Consulting GmbH
Development of a multilingual evaluation system for employee surveys with up to 400 million records per survey.
Implementation of dynamic report generation and team-based analysis with up to 10,000 individual reports in Microsoft PowerPoint.
Integration of statistical methods such as correlation, cluster analysis, discriminant analysis, logistic regression, and other regression techniques.
Technical project leadership for software and database development, data analysis, and ensuring data quality and integrity.
Use of MS SQL Server (SSIS, SSRS, SSAS), .NET, VBA, and XML Schema.
Data Science Specialist, Team Lead
Gesellschaft für Konsumforschung (GfK) GmbH / Coca Cola AG
Design and implementation of an interactive evaluation system with complex calculations for product placement in retail.
Development of a mobile questionnaire for around 600 users to capture product placements in retail.
Technical project leadership for software and database development, data analysis, and ensuring data quality.
Use of MS SQL Server (SSIS, SSRS, SSAS), MS Access, VBA, and .NET.
Use of data warehousing techniques and T-SQL to represent evaluation and reporting logic.
Business Intelligence Specialist, Team Lead
AOK AG / AOK Baden-Württemberg
Built a data warehouse for insurance services including modules for online reporting, forecasting and fraud detection.
Responsible for data integration, data quality and consistency.
Led technical project management and coaching for software and database development as well as statistical data analysis.
Utilized MS SQL Server (SSIS, SSRS, SSAS) and .NET.
Employed MDX, DMX and T-SQL for complex analyses and forecasting models.
Self-employed
Comelio Business Solutions Pvt. Ltd
Worked independently focusing on offshore/nearshore development in databases, BI and XML.
Directed and executed projects with a development team in Chennai.
Self-employed
Comelio, Inc.
Worked independently focusing on BI, DWH and software projects for international clients.
Conducted consulting and development projects in the database and reporting environment on-site in Miami.
Business Intelligence Specialist, Team Lead
Santander Consumer Bank AG
Built and enhanced BI and reporting solutions for banking and credit products.
Utilized Oracle DB, Oracle OLAP and PL/SQL for data warehousing, OLAP analyses and reporting.
Served as team lead responsible for designing, implementing and optimizing the BI architecture.
Business Intelligence Specialist, Data Integration Specialist, Team Lead
Deutscher Bundesrat
Built a data warehouse with interactive reporting and complex data integration for federal states' financial budget data.
Performed time series analyses and forecasts on budget and financial metrics.
Led projects with responsibility for database and software development, data analysis and ensuring data quality.
Utilized MS SQL Server (SSIS, SSRS, SSAS), T-SQL, .NET, VBA, XML and OWL.
Developed complex reports and OLAP cubes as well as integration processes for heterogeneous data sources.
Data Science Specialist, Team Lead
T-Systems GmbH
Development of an OLAP and analysis system for personnel and health data.
Performing various multivariate analyses (e.g. regression and classification methods) in the health and HR context.
Technical project management with responsibility for database and software development as well as statistical analyses.
Use of Oracle DB, Oracle OLAP, PL/SQL, Java, and R.
Data Science Specialist, Team Lead
Teles AG
Development of an ontology-based expert system for competitor monitoring in technology areas based on patents and level of innovation.
Design and implementation of an ontology-based expert system using Oracle DB, Java, PHP, XML, and OWL.
Use of XSLT and XSL-FO for presentation and document formatting.
Technical project management with responsibility for data modeling, software, and database development.
Performing data and text analyses to assess technological developments.
Data Science Specialist, Team Lead
SchürmannSpannel AG
Development of an expert system for the analysis and evaluation of factory buildings, including usage simulation and an interactive assessment questionnaire.
Use of MS SQL Server, .NET, XML, and OWL for data storage, logic, and knowledge representation.
Project management with responsibility for database and software development as well as data analysis.
Award-winning project in the Ruhr Area Future Competition.
Use of C#, T-SQL, XSLT, and XML Schema for implementing the expert system.
Reporting Specialist
Maporama SA
Development of an analysis system for comparing usage profiles in map search.
Implementation of reports and analyses using Oracle DB and Oracle Reports.
Programming with Java and PL/SQL to implement business logic and map functions.
Self-employment
Comelio GmbH
Self-employed work focusing on BI, data warehousing, data analysis, and software development.
Setting up and leading projects for databases, reporting, XML integration, and statistical analyses in Essen and Berlin.
Skills
Databases:
- Ms Sql Server
- Oracle
- Snowflake
Methods:
- 3nf
- Data Vault
- Star Schema
Data Integration:
- Azure Data Factory
- Integration Services (Ssis)
- Altova Mapforce
Reporting:
- Ms Azure Analysis Services
- Ms Azure Synapse
- Ms Power Bi
- Shiny/r
- Altova Stylevision
Data Analysis:
- R
- Python
- Minitab
- Ibm Spss Statistics
Software:
- T-sql
- Pl/sql
- Python
- R
Modeling:
- Uml
- Bpmn
Xml:
- Xml Schema
- Xslt
- Xsl-fo
- Altova Missionkit (Xmlspy, Stylevision, Mapforce)
Software Development And Tools:
- Git
- Jira
- Octane
- Confluence
- Sparx Enterprise Architect
Data Analysis Methods:
- General Linear Model (E.g. Regression Analysis, (M)an(c)ova, Logistic Regression)
- Multivariate Techniques (E.g. Cluster Analysis, Discriminant Analysis, Factor Analysis, Structural Equation Modeling, Conjoint Analysis, Multidimensional Scaling, Time Series Analysis)
- Data Mining (E.g. Decision Trees, Artificial Neural Networks, (Sequence) Cluster Analysis And Association Analysis)
- Engineering Statistics (E.g. Design And Analysis Of Experiments, Statistical Process And Quality Control)
Software:
- Analysis, Visualization And Programming With R
- Ibm Spss Statistics
- Jmp
- Minitab
Databases:
- Ms Sql Server
- T-sql
- Data Warehousing With Integration / Reporting / Analysis Services
- Oracle
- Sql And Pl/sql
- Olap And Data Warehousing
- Data Mining
Languages
Education
Bergische Universität Wuppertal
Diploma · Economics with a focus on Business Informatics · Wuppertal, Germany
Université de Sorbonne I
Bachelor's degree · Paris, France
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