Greg has been mapping in OpenStreetMap since 2009. But has been mapping professionally even earlier - as he was employed in Blom (a pan-European mapping company with more than 1000 employees accross most of Europe).

Greg is an open source and open data advocate. Though he started as a statistical consultant and developer (using FOSS like Debian, R, etc), he ended up in the geo business. Now he consults clients on several areas regarding geodata - mostly within the use of geodata and GIS at public admin clients. He has a strong belief in Open Data, and co-founded the company Septima in January 2013 to utilize the newly released national data.

Greg is an avid speaker on the subject of Open Data.

OSGEO-profile: https://wiki.osgeo.org/wiki/User:GregersP