I really enjoyed working with Jonas! I had a problematic (to me) issue trying to fix a faulty spreadsheet. Jonas explained that he could fix the problem but the fix would be a patch likely to repeat. Jonas gave me the option of creating a new spreadsheet, using the old one as a guide, which I accepted. Jonas delivered quicker than the deadline. After discovering errors, we worked together until I was satisified with the final results. I would definitely recommend Jonas and I would use him again in the future!

Jonas did an exceptional job helping me build a very complex construction financial system in Google Sheets. This was not a simple spreadsheet — it involved multiple interconnected tabs, cost tracking logic, and construction-specific financial workflows. Jones approached the entire project with professionalism, patience, and strong technical skills. Throughout the process, I requested many revisions as we refined the system to match real construction operations. Jones carefully addressed every single change, one by one, without ever showing frustration. Even when the project required multiple rounds of adjustments, he remained responsive, thoughtful, and solution-oriented. What impressed me the most was his commitment to doing the job correctly. Even during periods when he had other pressures and work commitments, he still took the time to review the details and help improve the system. He never rushed me to approve the project and made sure everything was functioning properly before closing it. The final result is a sophisticated construction financial model that will significantly improve how we track project costs and financial performance. Jones is highly capable with advanced spreadsheets and understands how to translate complex operational needs into a working system. If you need someone who is technically strong, patient with revisions, and genuinely committed to delivering a high-quality result, I strongly recommend Jones. I would absolutely work with him again.

I have worked with Jonas several times over the past 4 months. In each encounter, Jonas has proven to be very responsive to my requirements, with a deep understanding of what the problem is and the possible solutions. Again, I highly recommend Jonas and will continue to ask for his help.

Jonas was very patient as we worked through my project needs! He definitely went the extra mile to make sure everything was what I requested. Thank you, Jonas!

Working with Jonas has been a fantastic experience. He is excellent and appreciates that not all business owners are skilled in the art of producing detailed excel P&L and CFF decks. Jonas is a wizard with Excel and i will be working with him again. Highly recommend.

Dude's a modeling ninja. Can't wait to ride with this guy as we scale our company

Absolutely excellent. He solved my issue very quickly. Very polite, helpful and knowledgable!