He played the majority of his professional career for the club Reims, winning five French championships and appearing in two European Cup finals.

[1] Nicknamed "The Hero of Highbury" after an outstanding individual performance against England in London in 1951, Jonquet was integral to the France national team of the 1950s, playing at the World Cup finals of 1954 and 1958.

Two further high points of these years took place on international fields: in October 1951 with France he played in London against England (which included Alf Ramsey and Billy Wright).

Jonquet's superb game helped France obtain a 2–2 draw, and on the next morning a newspaper headline referred to him as "The Hero of Highbury".

Robert Jonquet's fellow players with Reims reads like a Who's Who of French football during the 1950s: between goalkeeper (Dominique Colonna) and offensive forces (Raymond Kopa, Michel Hidalgo, Léon Glovacki, Jean Vincent, Just Fontaine, Roger Piantoni, René Bliard) stood safe defensive players such as Roger Marche, Armand Penverne, Albert Batteux, Michel Leblond, Jean Wendling – and evenly over one decade for Jonquet, who is the only players who played in two finals of the European Cup as well as two finals of the Latin Cup.

In the half-time break – substitutes at that time not yet permitted – the team physician injected a pain-satisfying syringe, and Jonquet was able to stand on two legs.

[8] At RC Strasbourg, Jonquet moved from the playing field to the coaching sidelines, enjoying a spell with Reims and afterwards with a small teams, Romilly-sur-Seine, Épernay and Châlons-sur-Marne.