  The HL-LHC run is anticipated to start at the end of this decade and will
pose a significant challenge for the scale of the HEP software and computing
infrastructure. The mission of the U.S. CMS Software & Computing Operations
Program is to develop and operate the software and computing resources
necessary to process CMS data expeditiously and to enable U.S. physicists to
fully participate in the physics of CMS. We have developed a strategic plan to
prioritize R&D efforts to reach this goal for the HL-LHC. This plan includes
four grand challenges: modernizing physics software and improving algorithms,
building infrastructure for exabyte-scale datasets, transforming the scientific
data analysis process and transitioning from R&D to operations. We are involved
in a variety of R&D projects that fall within these grand challenges. In this
talk, we will introduce our four grand challenges and outline the R&D program
of the U.S. CMS Software & Computing Operations Program.
