Summary
Overview
Work History
Education
Skills
Certification
Languages
Agreement
Passions
Timeline
Generic
Marcin Darnowski

Marcin Darnowski

Lodz

Summary

I enjoy working with people and numbers. A job where the insights derived aid in making informed business decisions and generate a competitive edge for the company. I have achieved remarkable success by increasing the margin on wholesale telecommunication services from 5% to 80% through in-depth analysis of billing records (Bluesend). By analyzing telecommunications datasets, I uncovered unusual behaviors that helped detect fraud (4Carriers). My work at Orientelco involved a unique approach creating a financial model for the business plan derived from Eurostat dataset based on the tourism industry.

Overview

26
26
years of professional experience
1
1
Certification

Work History

Data and Business Consultant

Axon Network Sp. z o.o.
01.2018 - Current
  • Creating dashboards for the decision makers in Gromar Sp. z o.o. (elearing company)
  • Analysis of market datasets to strategy and finance planning in startups Surfie.eu and Mixchat.com
  • Analysis of corporate datesets to improve business processes in startup: SignConnect.pl , Edolando.com
  • Implementation and management billing/routing system : Novatel voice platform , SIMberry - SMS system
  • Collaborate with stakeholders like business analysts, IT staff, business manager, directors, investors to provide meaningful insights

Carrier Relations Manager

4Carriers Sp. z o.o.
01.2013 - 12.2017
  • Real-time analysis of telecommunications traffic on Jerasoft billing system
  • Daily basis analysis of quality and margin.
  • Preparing periodical reports to board of directors, the regulator and other operators
  • Management of customer's and supplaier's pricing lists
  • Analysis of Call Detaill Reports (sql, csv files) in case of dispute with customer/supplaier
  • Data Heroes - member of data analysis sociaty

Carrier Relations Manager

MNI Telecom S.A.
09.2010 - 12.2012

Carrier Relations Manager

Internet Group S.A.
09.2008 - 08.2010

Business Development Manager

T-Mobile S.A.
07.2007 - 08.2008

Carrier Relations Specialist / Bookkeeper

GTS Polska Sp. z o.o.
10.1999 - 06.2007
  • Analysis of roaming mobile traffic
  • Coordinating the implementation of T-Mobile access points across networks such as Radisson, McDonald's, Coffee Haven, and Pizza Hut
  • Management of signalization, routing and billing proceses (one system)
  • Creating of telecommunication project of minutes exchange
  • Management of signalization, routing and billing proceses ( many date sources)
  • Preparing customer report of service usage from SQL data basis
  • Preparing pricing lists in excel
  • Analysis of dispute between partner vs comany

Education

Postgraduate Diploma - Management of Information Systems (Data Warehousing)

SGH Warsaw School of Economocs
Warsaw
06.2006

Master of Financial Economics -

SGH Warsaw School of Economics
Warsaw
06.2000

Skills

  • Analytical mindset
  • Critical thinking
  • Out-of-the-box creativity
  • Independence
  • Communication and Interpersonal skills
  • Connecting the dots between IT and business
  • Excel
  • Power Query
  • T-SQL
  • MySQL
  • Power BI
  • Tableau
  • Python (Pandas)
  • Chat GPT
  • Gemini user

Certification

  • Data Science: Data analysis in PYTHON i PANDAS
  • The complete POWER BI course
  • MySQL Creating and management of databases

Languages

English
Polish

Agreement

I agree to the processing of personal data provided in this document for realizing the recruitment process pursuant to the Personal Data Protection Act of 10 May 2018 (Journal of Laws 2018, item 1000) and in agreement with Regulation (EU) 2016/679 of the European Parliament and of the Council of 27 April 2016 on the protection of natural persons with regard to the processing of personal data and on the free movement of such data, and repealing Directive 95/46/EC (General Data Protection Regulation)

Passions

  • Family
  • Travel and geography
  • Sport: swimming, walking, birdwatching
  • Reading of books

Timeline

Data and Business Consultant

Axon Network Sp. z o.o.
01.2018 - Current

Carrier Relations Manager

4Carriers Sp. z o.o.
01.2013 - 12.2017

Carrier Relations Manager

MNI Telecom S.A.
09.2010 - 12.2012

Carrier Relations Manager

Internet Group S.A.
09.2008 - 08.2010

Business Development Manager

T-Mobile S.A.
07.2007 - 08.2008

Carrier Relations Specialist / Bookkeeper

GTS Polska Sp. z o.o.
10.1999 - 06.2007

Postgraduate Diploma - Management of Information Systems (Data Warehousing)

SGH Warsaw School of Economocs

Master of Financial Economics -

SGH Warsaw School of Economics

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Marcin Darnowski