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The Transiting Exoplanet Survey Satellite (\textit{TESS}) mission wasdesigned to perform an all-sky search of planets around bright and nearbystars. Here we report the discovery of two sub-Neptunes orbiting around the TOI1062 (TIC 299799658), a V=10.25 G9V star observed in the TESS Sectors 1, 13, 27& 28. We use precise radial velocity observations from HARPS to confirm andcharacterize these two planets. TOI 1062b has a radius of2.265^{+0.095}_{-0.091} Re, a mass of 11.8 +\- 1.4 Me, and an orbital period of4.115050 +/- 0.7 days. The second planet is not transiting, has a minimummass of 7.4 +/- 1.6 Me and is near the 2:1 mean motion resonance with theinnermost planet with an orbital period of 8.13^{+0.02}_{-0.01} days. Weperformed a dynamical analysis to explore the proximity of the system to thisresonance, and to attempt at further constraining the orbital parameters. Thetransiting planet has a mean density of 5.58^{+1.00}_{-0.89} g cm^-3 and ananalysis of its internal structure reveals that it is expected to have a smallvolatile envelope accounting for 0.35% of the mass at maximum. The star'sbrightness and the proximity of the inner planet to the "radius gap" make it aninteresting candidate for transmission spectroscopy, which could furtherconstrain the composition and internal structure of TOI 1062b.

TESS and HARPS reveal two sub-Neptunes around TOI 1062