I am the most active developer on LedgerSMB, which accounts for most of my consulting and freelance work. I also offer PostgreSQL-related consulting services and more.
I also am a co-founder of Efficito which offers LedgerSMB ERP hosting for small to midsized businesses. Efficito: Robust, flexible, and open.
I also head the database team for for Adjust GmbH, working with PostgreSQL databases into the 20TB range and database environments of up to 4PB. My team is responsible for managing this data, and for building the next generation of products which will drive the market forward.