© 2019 CEUR-WS. All rights reserved. This paper describes the lessons learned during the creation, development, and delivery of the first MicroMasters program. The MITx MicroMasters credential in Supply Chain Management, consisting of 5 MOOCs and a comprehensive final exam (CFx), was launched in the Fall of 2015. As of March 2019, 26 course runs and 4 CFx exams have been delivered to over 280,000 learners. A total of 1,592 learners have earned the MicroMasters credential so far. The two key learnings from this experience are that MicroMasters are neither simply a collection of individual MOOCs nor are they the same as a residential in-person program. MicroMasters have unique properties and requirements that should be considered in their design and delivery.