Penaud played for the Clermont Academy side and he was picked by the France U20 side for the 2015 World Rugby Under 20 Championship. He scored 2 tries against the England u20 side. but they lost in the semi-finals to eventual champions, New Zealand. The following year he made the u20 team again for the 2016 World Rugby Under 20 Championship. He only scored one try against Japan in the whole tournament with France finishing 9th.