Instructor social presence involves instructors establishing their presence as "being there" in terms of frequency of communication and interaction with students as well as supporting students throughout the learning process (Lowenthal 2015). Instructor social presence can be constructed and maintained through the design and facilitation of online courses. Studies have indicated that instructor social presence can be correlated with increased learning satisfaction, engagement and achievement as well as learners perceptions of the instructor. This sequential explanatory mixed method study investigated the effects of instructor social presence on achievement, satisfaction and learner social presence and further sought to identify effective instructor social presence techniques in asynchronous online courses. The results of this study showed that the degree of instructor social presence significantly influenced instructor perceptions of student achievement. Findings also suggest that a well-designed collaborative learning activity can be an effective strategy for building instructor social presence.