Instructional technologist plays an important role in K-12 CCSS transition. However, few studies were conducted to explore what roles instructional technologist has played in technology integration during CCSS transition. This study explored the roles of instructional technologists in technology integration. This study also investigated the strategies instructional technologists utilized to promote technology integration and the challenges instructional technologists faced during the process of supporting technology integration. Findings showed that instructional technologists' roles in K-12 schools included supporter, connector, filter, leader, catalyst, and lifelong learner.