Customer testimonials and references

Our customers are mostly the hidden champions of the German SME sector. We meet their products and services everywhere in our everyday lives. Without them, the world would not be the way it is today. 


World Vision Germany e. V.

For over 65 years, World Vision has been fighting worldwide for a better and fairer world for all children. In Germany, World Vision is supported by over 160,000 donors. It is in line with World Vision's Christian self-image to help all people in need - regardless of their origin and religion.

The particularly responsible handling of donations is confirmed by the DZI donation seal and the certificate of the German Donations Council. World Vision has also received several awards for special transparency (including from PricewaterhouseCoopers, Capital and Spiegel Online).

Since 2017, Fabian Shirokov has been helping us convert our homegrown SQL reporting to visually appealing and clearly interpretable Power BI reports.
Data from a multi-tenant Microsoft Dynamics NAV system was to be made available to several European World Vision offices so that key figures could be compared across Europe. The complex access and authorization requirements presented a particular challenge. In addition to technical and content-related consulting, Mr. Shirokov also supported us during the rollout of the solutions through training and education, and enabled our internal IT staff to support the solution during ongoing operations.
Thanks to his extensive experience and in-depth expertise in the ever-changing Microsoft world, we were able to successfully complete the "Reporting Revolution" project with significantly higher quality than originally expected. The increased transparency allows us to use our donations even more efficiently - for the benefit of the children we support. We can recommend Mr. Shirokov as a consultant and implementer without exception!

Marc Weyer-Menkhoff, Team Leader IT Projects, World Vision Deutschland e.V.

header-logo-claim (1)

TÜV Technical Monitoring Hesse GmbH

Giving certainty to the future

TÜV Hessen is a guarantor of safety and environmental protection, quality and marketability of plants, products and services - for private customers and business customers alike.

"A clearly structured hands-on training", this is how the training of data4Success conducted by Fabian Shirokov could be described in one sentence.

The Power BI training over two days covers all essential points to be able to create the first own Power BI reports on a solid basis. The training is clearly structured, the trainer was always on hand to provide advice and practical knowledge during the training.

Starting with the introduction to Power Bi Desktop, the Power Query Editor up to publishing a report or creating a gateway, all these topics were covered. The individual topics were built up step by step on the basis of a case study, which was adapted to the own company and was explained very well. As a participant, you were always picked up and could apply the knowledge directly. Mr. Shirokov also always answered questions and explained ambiguities clearly and well.

Yavuz Tosun, Senior Software Developer, TÜV Hessen


J.T. Ronnefeldt KG

We stand for excellent tea - since 1823.

J.T. Ronnefeldt KG is a producer of premium tea that can be enjoyed at the breakfast buffet in the best hotels around the world. These exclusive teas make even die-hard coffee drinkers switch to tea. Tea connoisseurs appreciate the excellent tea qualities, which are produced with great craftsmanship - from picking in the tea gardens, in careful production steps at the origin, "blending", tea tasting to filling and packaging in bags and tins.