Introduction: The Emergency Medicine Chief Resident Incubator is a year-long curriculum for chief residents that aims to provide participants with a virtual community of practice, formal administrative training, mentorship, and opportunities for scholarship. Methods: The Chief Resident Incubator was designed by Academic Life in Emergency Medicine (ALiEM; www.aliem.com) a digital health professions education organization in 2015, following a needs assessment in emergency medicine. A 12-month curriculum was created using constructivist social learning theory, with specific learning objectives that reflected 11 key administrative or professional development domains deemed important to chief residents. The topics covered included interviewing skills, contract negotiations, leadership, coaching, branding, conflict resolution, and ended with a focus on wellness and career longevity. A Core Leadership Team and Virtual Mentors were recruited to lead each annual iteration of the curriculum. The Incubator was implemented as a virtual community of practice using Slack©, a messaging and digital communication platform. Ancillary technology such as Google Hangout on Air© and Mailchimp© were used to facilitate learner engagement with the curriculum. Three in person networking events were hosted at three large emergency medicine and education conferences with special medical education guests. Outcomes include chief resident participation rates, Slack© activity, Google Hangout© web analytics, newsletter email engagement, and scholarship. We also incorporated a hidden curriculum throughout the year with multiple online publications, competitions for guest grand round presentations, and incorporation of digital technologies in medical education. Results: A total of 584 chief residents have participated over the first 3 years of the Chief Resident Incubator; this includes chief residents from over 212 residency programs across North America. Over 27,000 messages have been shared on Slack© (median 214 per week). A total of 32 Google Hangouts© have occurred over the course of the inaugural Incubator including faculty mentorship from Dr. Rob Rogers, Dr. Dara Kass and Dr. Amal Mattu. A monthly newsletter was distributed to the participants with an opening rate of 59%. Scholarship included 26 published academic blog posts, 2 open access In-Training exam prepbooks, a senior level online curriculum with 9 published modules and 3 book club reviews. Conclusion: The Chief Resident Incubator is a virtual community of practice that provides longitudinal training and mentorship for chief residents. This Incubator framework may be used to design similar professional development curricula across various health professions using an online digital platform.