Jets produced in hard scattering processes provide an important probe of the thermodynamical and transport properties of the quark gluon plasma (QGP) created in high-energy nuclear (AA) collisions. The products of the hard scattering evolve as parton showers propagating through the medium and experience in-medium energy loss. The information on the initial jet properties can be extracted if an electroweak boson is produced together with parton in the initial hard scattering. Photon and Z boson-tagged measurements of the parton energy loss exploit the fact that the outgoing photon or leptons originating from Z boson are unmodified while traversing the QGP, and thus provide information about the momentum, direction, and flavor of the associated hard-scattered parton before it begins to shower and become quenched. In this proceeding, Z+jet and isolated $\mathrm{\gamma}$+jet measurements by CMS are reported.