Tõnis is a freelance GIS/IT consultant from Tartu, Estonia. Integrating spatial data and spatial data usage into existing and newborn information systems alike is his main focal point of work. And of course, advocating for the adoption of FOSS for the purpose along the way.

OSGeo charter member since 2017. FOSS4G Program Committee member on occasions since then, he co-chaired the General Program Committee for FOSS4G 2023 in Prizren (Kosovo). FOSS4G Europe 2024 conference chair, and a general menace for FOSS4G Europe 2025.