Thomas Urban is the owner of Urban-Software.de, a software and consulting services company providing add-ons, plugins, and services for the Cacti Performance Monitoring systems. He has been in the consulting business for more than 5 years and has been creating web applications for over 20 years building reporting interfaces, network management software, asset management sites, and much more.
He is a part of the Cacti community and is known as Phalek in the Cacti forums, where he is among the Top 10 contributors.
He started writing the first Cacti Beginner's Guide for Cacti 0.8 back in 2011. The second edition is his second official effort.