Description: Non-profit public benefit organization that produces and distributes quality Open Source software, and provides professional services based on that software.
Function: Software Engineer
Tasks: Software design, Software development, Protocol engineering
Specifics:

Design and development of the recently started http://www.isc.org/bind10 programme.
Involved in standards work at the Internet Engineering Task Force http://www.ietf.org

Description: Foundation to develop, implement, evaluate, and promote new protocols and applications for the Internet.
Function: Developer
Tasks: Development, protocol engineering, application testing, systems maintenance
Specifics:

One of the two original developers of the ldns DNS library, a C library to simplify DNS programming. It supports RFCs like the DNSSEC documents (RFC4033-4035). Currently the only main developer and maintainer. Apart from being a general library, this contains several specific tools, amongst which:

With ldns, created an example and interoperability testing implementation for the DNSSEC extension NSEC3 (http://www.rfc-editor.org/rfc/rfc5155.txt)
Involved in the creation and validation of several RFCs, most notably RFC4033-4035, RFC4648 and RFC5155.
Developer and maintainer of the current iteration of NLnet Labs' and RIPE NCC's DISTEL Testlab, a test setup for performance and regression testing of DNS authoritative servers. Created a way to do basic classifications of differences between server implementations. Currently reimplementing the control and configuration tools of the testlab in Python.
Provided assistance with the design and code reviews of NSD 3, an authoritative name server.
Provided assistance with the design and code reviews of Unbound, a validating recursive name server

Description: ICT Company specialized in creating inter- and intra-net applications
Function: Software Engineer
Tasks: Design and development of Java-based Internet applications

Description: Internet Provider
Function: Helpdesk for an Internet provider.
Tasks: Provide technical help to customers with their network and Internet connections

Several personal projects can be found on http://www.tjeb.nl/Projects
1999 - 2001: Chair of Thalia, the student association for Computing Science at the University of Nijmegen
2000 - 2001: Treasurer of 'Stichting Beet', a student association encompassing the technology studies at the University of Nijmegen
2001 - 2002: Chair of 'Stichting Beet'