I can recommend Sonja as an engineer with international expertise. I am based in the US and met Sonja on the Irish Rail from Dublin to Galway a few months ago and what an amazing chance meeting that was. I then reached out to her for a project involving highly technical matters concerning electrical engineering for an independent opinion and she promptly responded, reviewed my materials and within hours provided a detailed report of her review and thoughts. She is extremely smart, kind, generous, responsive and reliable. She has my highest recommendation.