Noncentrosymmetric superconductors provide a unique platform to explore the interplay of antisymmetric spin-orbit coupling and pairing symmetry. In this study, we report the synthesis and comprehensive characterization of the noncentrosymmetric ternary $\alpha$-Mn compound ${\mathrm{NbTaOs}}_2$ using electrical resistivity, magnetization, specific heat, and muon spin rotation/relaxation ($\mu \mathrm{SR}$). It confirms that ${\mathrm{NbTaOs}}_2$ is a type-II bulk superconductor. Transverse-field $\mu \mathrm{SR}$ and specific-heat data consistently indicate a moderately coupled, fully gapped superconducting state.

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• Intermetallic compounds
• Noncentrosymmetric materials
• Type-II superconductors
• Unconventional superconductors
• Magnetization measurements
• Muon spin relaxation & rotation
• Resistivity measurements