SANTA CLARA, Calif.--(BUSINESS WIRE)--Citrix Systems, Inc. (Nasdaq:CTXS) today announced the addition of Francis A. deSouza, technology industry veteran and president of Illumina, a leading biotechnology company, to its board of directors, effective immediately. deSouza began his career at IBM’s TJ Watson Research Center and went on to consult on technical and change management projects with Gemini. Later, he founded two technology companies, both of which were acquired, and spent time at Micro