  Superconducting high entropy alloy (HEA) are emerging as a new class of
superconducting materials. It provides a unique opportunity to understand the
complex interplay of disorder and superconductivity. We report the synthesis
and detail bulk and microscopic characterization of
Nb$_{60}$Re$_{10}$Zr$_{10}$Hf$_{10}$Ti$_{10}$ HEA alloy using transport,
magnetization, specific heat, and muon spin rotation/relaxation ($\mu$SR)
measurements. Bulk superconductivity with transition temperature $T_{C}$ = 5.7
K confirmed by magnetization, resistivity, and heat capacity measurements.
Zero-field $\mu$SR measurement shows that the superconducting state preserves
time-reversal symmetry, and transverse-field measurements of the superfluid
density are well described by an isotropic s-wave model.
