ABSTRAKSI: Knowledge Management System (KMS) offers solutions for managing knowledge by support information technology. Through KMS, a company can keep the existing knowledge in a repository and can be accessed by employees at any time. In addition, through KMS, employees can collaborate together to develop knowledge. KMS Development in PT Intimas Wisesa use a wiki engine as supporting applications. Wiki engine chosen is the MediaWiki. MediaWiki provides the features that are useful for storing knowledge, disseminate knowledge, promote collaboration, and facilitate users in searching knowledge required. To measure the benefits of KMS implementation, it is used Knowledge Centric Organization (KCO) model proposed by US Department of Navy (DON). This model uses three types of specific measures to monitor the KM initiative from different perspectives: outcome metrics, output metrics, and system metrics.Kata Kunci : knowledge management systems, collaboration,MediaWiki, KCO modelABSTRACT: Knowledge Management System (KMS) offers solutions for managing knowledge by support information technology. Through KMS, a company can keep the existing knowledge in a repository and can be accessed by employees at any time. In addition, through KMS, employees can collaborate together to develop knowledge. KMS Development in PT Intimas Wisesa use a wiki engine as supporting applications. Wiki engine chosen is the MediaWiki. MediaWiki provides the features that are useful for storing knowledge, disseminate knowledge, promote collaboration, and facilitate users in searching knowledge required. To measure the benefits of KMS implementation, it is used Knowledge Centric Organization (KCO) model proposed by US Department of Navy (DON). This model uses three types of specific measures to monitor the KM initiative from different perspectives: outcome metrics, output metrics, and system metrics.Keyword: knowledge management systems, collaboration,MediaWiki, KCO model