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Maciej Gajdulewicz

Maciej Gajdulewicz

Risk Data and Technology Expert (Manager)

EY | Warsaw, Poland

Technologies

My Portfolio Highlights

My New Track

Data Manipulation

My New Course

Introduction to Python

My New Track

Data Manipulation

Quantitative magician, conjuring valuable knowledge from data spells.

My Work

Take a look at my latest work.

course

Introduction to ChatGPT

course

Introduction to R

course

Introduction to Python

course

Introduction to ChatGPT

DataCamp Course Completion

Take a look at all the courses I’ve completed on DataCamp.

Courses

Introduction to Python
Introduction to SQL
Introduction to R
Intermediate Python

My Work Experience

Where I've interned and worked during my career.

EY | Oct 2021 - Present

Risk Data and Technology Expert (Manager), Financial Risk and Analytics

• Actively participated in leading data-centric projects for financial institutions across Poland, the United Kingdom, and Ireland. • Developed and enhanced analytical models, demonstrating expertise in data analysis and model construction. • Managed data collection, cleansing, computation, and transformation processes to create meaningful models and reports. • Ensured data integrity and quality through detailed documentation and review of data handling procedures. • Refinement of internal methodologies and processes. • Automated backtesting and model surveillance, improving efficiency and accuracy. • Utilized SAS, SQL, Python and R for data manipulation and technical operations, ensuring streamlined task execution across projects.
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EY | Oct 2017 - Sep 2021

Consultant, Financial Risk and Analytics

• Engaged in pivotal projects for financial institutions located in Poland, America, Switzerland, and Germany. • Led a teams and actively participated in the coding, development, and documentation, including functional specifications, of a machine learning-based algorithm for micro-entrepreneur portfolio analysis and behavioral scoring mode for the agricultural sector. • Helped built a team and perform regulatory stress testing exercise, applying data analysis expertise for credit risk calculation and data reconciliation. • Supported an Swiss Bank impairment program for 15 months, contributing to IFRS9 model and reporting implementation, including E2E process integration across risk and finance units, and user training. • Provided a year of business and data analytical on-site support in Frankfurt, including regression testing and resolving production issues for a project focused on data on-boarding and integration into a centralized Financial Data Warehouse.

EY | May 2014 - Sep 2017

Analyst, Financial Risk and Analytics

• Served as an data and business analyst for top Polish banks, focusing on data analysis, development, and credit risk tool enhancement. • Improved the integration of a credit risk model by configuring new inputs, modifying calculations, and managing data across systems. • Expanded the model's capabilities by adding new outputs to the reporting layer and web application. • Managed data flow and ensured quality control in the risk parameter calculation process, including the implementation and testing of methodological assumptions. • Conducted testing of the ETL process and verified the precision of capital requirement calculations. • Contributed to the design, implementation, and testing of systems for monitoring and controlling market and liquidity risks.

EY | Jan 2014 - Apr 2014

Client Serving Contractor, Financial Risk and Analytics

• Participated in the development, testing, and maintenance of a multi-tiered web application and its associated relational database.

Mercer | May 2013 - Sep 2013

Junior Analyst

• Conducted thorough reviews for consistency of both quantitative and qualitative data of compensation input data from various companies, ensuring accuracy and reliability throughout the data cleaning and processing stages. • Prepared country report templates as part of the process preparation, streamlining the compilation of information. • Tested and evaluated new tools and macros, contributing to the enhancement and efficiency of the overall process.

McKinsey & Company | Mar 2012 - Jul 2012

Intern - Junior Research Analyst

• Provided support for a variety of internal and external projects across the telecommunications, energy, healthcare, and financial industries. • Managed the collection, processing, and visualization of financial and quantitative data, including press and web research. • Updated existing valuation models and responded to individual consultant inquiries to ensure project continuity and accuracy. • Compiled summary reports for the banking and insurance sectors, which were utilized in further project development and analysis.

McKinsey & Company | Sep 2011 - Oct 2011

Intern - Junior Research Analyst

• Provided support for banking M&A project. • Managed the collection, processing, and visualization of financial and quantitative data, including press and web research.

My Education

Take a look at my formal education

Master's degree in Quantitative Methods and Information Systems, specialization Management Information SystemsSGH Warsaw School of Economics | 2013
Bachelor's degree in Quantitative Methods and Information Systems, specialization Business InformaticsSGH Warsaw School of Economics | 2010

About Me

Maciej Gajdulewicz

Data and technology professional with 10+ years in data analysis, predictive modeling, and tool creation. Skilled in meeting business needs, pattern recognition, and software quality. Managed full project lifecycles, delivering robust solutions.

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