For years, employees of Cygnus Solutions were the maintainers of several key GNU software products, including the GNU Debugger and GNU Binutils (which included the GNU Assembler and Linker). It was also a major contributor to the GCC project. Cygnus developed BFD, and used it to help port GNU to many architectures, in a number of cases working under non-disclosure to produce tools used for initial bringup of software for a new chip design.
On November 15, 1999, Cygnus Solutions announced its merger with Red Hat, and ceased to exist as a separate company in early 2000. As of 2003, a number of Cygnus employees continue to work for Red Hat, and Tiemann is Red Hat's CTO.