The young forward then joined Basel's first team for their 1937–38 season in the Nationalliga (top tier of Swiss football).
[2] In the first principal round of the Swiss Cup, as Basel played against lower tier FC Breite, Monard scored five times.
[4] In his one season for Basel, including cup and friendlies, Monnard played 29 games in which he netted 34 times.
In the 1939–40 Nationalliga season Servette won the championship and his team college Georges Aeby became league top scorer.
In the 1943–44 Nationalliga season Monnard won his second Swiss championship with Lausanne and he was the team's top goal getter, he netted with 14 times.
In that season Lausanne also advanced to the Swiss Cup Final, which was played at Wankdorf Stadium in Bern on 10 April 1944.
[8] Monnard played the 1949–50 season with CS La Tour-de-Peilz but, after just one year, he returned to Cantonal for his fifth period with them.
Despite this promising start to his international career, the Swiss coach at this time Karl Rappan did not select Monnard to play at the 1938 World Cup.