Known for creating Jenkins, a continuous integration server, he specializes on Hudson, Java, XML, web services and all programming and system administration in general. Kohsuke has worked for Sun Microsystems,Inc. for about 8 years, and then briefly worked for Oracle as Sun was acquired by Oracle in 2010. Since 2010 April, he founded InfraDNA to work on Jenkins (then called Hudson), which eventually got acquired by CloudBees, where he is currently working as an architect.