"With full professionalism and commitment, Marcin Olszewski conducted a series of training sessions on consulting and strategic planning for the development of the company for the Management Board and for Directors of Britenet. (...)

The superb course of cooperation and its effects confirmed our belief that selecting Marcin Olszewski to carry out the training cycle was a right and valuable decision.

We highly recommend Marcin Olszewski as a reliable and experienced consultant."

Michał Borny - CEO Britenet Sp. z o.o.

"Mr. Marcin Olszewski is one of our not only regular but also top lecturers conducting online courses at the LABA business school. He has a very broad and unique business experience with an international perspective. He has the gift of sharing knowledge, is always perfectly prepared for classes, very reliable, and at the same time open to new ideas and suggestions. (...)

We highly recommend cooperation with Mr. Marcin - it is very satisfying, provides a lot of inspiration and allows you to achieve your intended goals"

L-A-B-A

„I wholeheartedly recommend Maria as an outstanding specialist in management and a high-class leader. Maria stands out for her ability to think strategically and effectively manage even the most complex projects. I recommend working with Maria..”

„Thanks to (…) Maria's attitude, as a Sponsor but also an active participant in the project work, not only were the goals achieved (such as improving the efficiency of processes, higher patient satisfaction), but also - crucially - the implemented changes were stable and maintained after the work was completed.

I strongly recommend cooperation with Maria in projects aimed at improving the efficiency and quality of processes or building operational strategies.”

„Maria built an effective team that achieved the set goals. She implemented a new, more effective department structure. She initiated projects that brought savings of several million złoty per year. (…)”

„(…) Maria has the rare ability to look at the business environment, both from a high level and from the perspective of key processes and their elements. She also has a very good insight on how data can be used to better understand business phenomena - both retrospectively and predictively. (…)”

„(…) Having extraordinary anaytic skills. she is really good in problem solving and finding undiscovered opportunities to push the business forward. Her goal-oriented approach quarantee expected effects delivery.
She is not only a good manager, but also a good man - listening other people and open for their needs. (…)”

I had the pleasure of working with Dariusz at several points in his professional career. I worked for him when he was the president of an energy company, but I also worked with him at later stages of his career. He is a professional through and through, he knows sales, energy, telecommunications, and people management very well. He has an extraordinary ability for deep analysis and strategic synthesis. He is creative, he has proven that he can build businesses from scratch, but he is also perfectly capable of operational management, achieving ambitious goals. He is an effective manager, he can be flexible, and he communicates well with his colleagues. I really appreciate working with Dariusz and I hope that we will have the opportunity to work together many more times.

Dariusz Chlastawa is a seasoned professional whom I had the pleasure of working with on projects in the telecommunications and energy sectors. His ability to combine strategic thinking with a practical approach to business was crucial to achieving our goals. I particularly appreciate his ability to:
- conduct precise market analysis and identify new business opportunities,
- develop effective business strategies,
- build high-performing teams.

I had the pleasure of working with Mr. Dariusz on several business projects that required in-depth analysis, strategic approach and effective implementation of activities. Mr. Dariusz stands out with his extensive knowledge of markets, trends and business mechanisms, which allows him to precisely identify the needs of the organization and propose solutions that have a real impact on development and increased efficiency. I can recommend him with a clear conscience as an expert in the field of business consulting. His commitment, knowledge and passion for work are of great value to any organization that is looking for solid support in the development of its business.

I had the privilege of working with Dariusz Chlastawa, an exceptional executive with over 30 years of experience across telecommunications, energy, FMCG, and franchising. Dariusz's leadership in building and scaling businesses is remarkable. As Vice President and CEO of Premium Mobile, he successfully established an MVNO from scratch, achieved full self-financing within four years, and became a market leader.

Dariusz has consistently delivered strong results, including transforming Energetyczne Centrum and driving the growth of mPunkt Polska SA. His strategic vision, leadership, and expertise in project management and business growth make him a valuable asset to any organization. I highly recommend him for senior leadership roles

A manager and consultant with a wealth of experience and knowledge, in particular in telecommunication and high tech sectors as well as with regards to marketing, management and sales in various B2C sectors. As I business and M&A lawyer, I always found it a positively challenging experience to work with Dariusz and all the projects have been always supervised/led by him in most professional way.