The Environment Architecture Division, Joint Staff (JS) J7 Deputy Director for Joint Training (DDJT), supported by General Dynamics Information Technology under a support contract with the DoD is applying commercial and open source information technologies to the training environment for a proof-of-concept effort to evaluate cloud computing solutions for future Joint, Service, and US-supported Coalition training. Key components of this effort include: 1) JS J7 M&S Roadmap to direct the migration of the current Joint Live, Virtual, Constructive (JLVC) training federation to a Joint Training Synthetic Environment (JTSE) founded on a converged infrastructure using shared web services and on-demand computing; 2) JS J7 support for NATO Science & Technology Organization (STO) NATO Modelling & Simulation (NMSG) Task Group MSG-136 M&S as a Service (MSaaS); 3) Testing and experimentation with various services will occur during the Coalition Warrior Interoperability eXploration, eXperimentation, eXamination, eXercise (CWIX) series and in conjunction with integration tests in the JS J7 facility in Suffolk, VA. MSG-136 support focuses on cooperative development of MSaaS standards with NATO coalition partners while concurrent experimentation and testing ensure practical and useful cloud computing strategies. Participation in the CWIX experimentation complements MSG-136 support and will enable M&S services with C2 systems which are critical components of the Joint and Coalition training environment. Integration events at JS J7 are planned monthly during FY16 and beyond to test and validate web services and associated APIs. Finally, the JS J7 M&S Roadmap will need to follow the recent guidance by DDJT and previous strategies such as the 2011 DoD IT Strategy and Roadmap and the 2012 DoD CIO Cloud Computing Strategy in order to chart the course to the objective JTSE. This paper will introduce key components of the JTSE and MSG-136 efforts, discusses synergies achieved among JTSE and MSG-136, compare and contrast the results based on our testing and experimentation and summarize their influences on future support of US Joint Force training.