August 12, 2026
This weekend — at FOSSY 2026, Software Freedom Conservancy honored Mark J. Wielaard — decades-long GNU contributor, Valgrind and Elfutils maintainer, and Sourceware volunteer with the second annual Distinguished Service Award in Software Freedom. The award included a laser-etched lucite trophy and a cash award of one billion binary USD (US$1,024 for those who prefer decimal).
Photo of Mark J. Wielaard holding award, copyright Mark J. Wielaard , CC-BY 3.0
This award is granted annually to a FOSS contributor who has demonstrated many years of dedicated service to software freedom in both volunteer and professional capacities. Mark Wielaard fits this criterion perfectly.
Mark began his work in Free Software as a volunteer for the Classpath project in the late 1990s. At the time, creating a FOSS reimplementation of the proprietary Java language and its runtime libraries was an extremely urgent need for the future of software freedom. Later, Mark shifted his focus to gcj — a front-end to the GNU Compiler Collection for Java.
When the for-profit entity in control of Java (Sun (now Oracle)) released some of their core Java libraries and infrastructure as FOSS, Mark led the IcedTea effort that sought to reconcile those releases with the existing Classpath libraries.
Once the future of Java language infrastructure that respected software freedom was secured, Mark moved on to other projects. Mark became (and remains to this day) the maintainer of the Valgrind project — an instrumentation framework for building dynamic analysis tools for software. And concentrated his efforts on debuggability efforts, contributing to projects like systemtap and elfutils. Mark is also a member of the DWARF Debugging Standard Committee.
Mark is one of many key FOSS developers who has designed his career so that his employers have funded much of his FOSS work. Nevertheless, Mark continues his volunteer work after hours as a key contributor who maintains Sourceware — the oldest FOSS collaboration and developer infrastructure hostingite in history.
We at SFC thank Mark for his decades of service to software freedom, and we are proud to announce Mark J. Wielaard as the second annual winner of the Distinguished Service Award in Software Freedom. You can also read the remarks made by SFC's Policy Fellow & Hacker-in-Residence, Bradley M. Kühn.