Beekman parachuted into occupied France on the night of 17/18 September 1943 to serve as wireless operator for the SOE's 'Musician' circuit.
On the night of 17–18 September 1943, Yolande Beekman was parachuted into France near Saint-Quentin as a wireless operator for the Special Operations Executive (SOE), attached to the Musician network led by Guy Bieler. Trained in Morse code, cipher work and clandestine radio operation, she was one of only a small number of women entrusted with this perilous role.
Wireless operators were among the most valuable — and most hunted — SOE agents. The Germans employed direction-finding technology to track radio transmissions, meaning operators like Beekman risked capture with every broadcast. Despite this constant danger, she maintained vital communications between the Musician circuit and London for nearly a year, relaying intelligence, coordinating supply drops, and supporting resistance sabotage operations in the Saint-Quentin area of northern France.
Her competence and discretion allowed the network to function effectively for an extended period, a testament to her training and nerve. Female wireless operators like Beekman defied contemporary assumptions about women's capabilities in warfare, operating in one of the most technically demanding and dangerous roles within the resistance infrastructure. Her deployment exemplifies the SOE's pioneering — if controversial — use of women in active combat-support roles behind enemy lines, at a time when women were officially barred from front-line combat duties in the regular armed forces.